Holding Electromagnets

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Beverly Mitchell Goodman
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www.nafsa.es Holding electromagnets Holding Electromagnets Description: The holding electromagnets (electromagnetic and electropermanent) are used to attract and hold ferromagnetic pieces.

ATTRACTION Exterior pole Central pole FASTENING FACE Flying leads Threaded hole to electromagnet fixation Coil Carcase It is not recommended to use holding electromagnets in applications that require

Conditions for a correct instalation, use and maintenance: Piece to fix the holding electromagnet Pitching It is convenient to leave a tiny gap between the electromagnet fixing face and the part

1 Holding electromagnets Holding Electromagnets Description: The holding electromagnets (electromagnetic and electropermanent) are used to attract and hold ferromagnetic pieces. The maximum force efficiency is achieved with the piece to be hold over the attraction's face and in direct contact with both poles (outside pole and inside pole). ATTRACTION Exterior pole Central pole FASTENING FACE Flying leads Threaded hole to electromagnet fixation Coil Carcase It is not recommended to use holding electromagnets in applications that require an air gap>0.2mm. The retention force will fall down exponentially when the air gap increases (as can be seen in the data sheet of each product). Conditions for a correct instalation, use and maintenance: Piece to fix the holding electromagnet Pitching It is convenient to leave a tiny gap between the electromagnet fixing face and the part fixed to it so that the product can move and adapt to the piece to hold Allowance dl Piece to hold: To obtain the maximum performance, its surface must be same as or bigger than the attraction face of the holding electromagnet Air gap In electropermanent holding electromagnets, vibration and temperature higher than the one recommended must be avoided because it could damage the magnet and the product would loose force. Maintenance: If the attraction face suffers bumps when working, a reduction of force will occur due to the air gap generated by them, and to recover the initial force, attraction face must be rectified. 99

CUSTOMIZATION: Holding electromagnets The models described in the catalogue are standard and minimum manufacturing batches are not required.

If any modification is needed, please ask NAFSA about the possibility and the minimum manufacturing batch required.

2 CUSTOMIZATION: Holding electromagnets The models described in the catalogue are standard and minimum manufacturing batches are not required. However, there is the possibility of customizing them to suit better customer's needs. See below some of the most common customizations. If any modification is needed, please ask NAFSA about the possibility and the minimum manufacturing batch required.. ELECTRICAL CUSTOMIZATION a) Integrated electronics only in versions with DIN40A connector: a.) For peak suppression Examples: a.2) Power display Examples: a.) For rectification Examples: Holding electromagnets Free wheel diode+second diode to protect the free wheel diode against reverse polarity. Connector under voltage display by LED 4 diodes with varistor at the input Varistor Varistor+LED display b) Cable length modification and terminal or connector mounted over cables: 4 diodes with doble varistor. In some holding electromagnet models, cables can be replaced by connector DIN40 or clamping screw (see each serie datasheet). In the holding electromagnet models which have supply cables, this length can be modified to customer requirement. Likewise any kind of terminals or connectors can be added to the cables. Example : Example 2: Example :. c) Intermediate duty-cycle manufacturing: In the VEM and ERM are manufactured by default with duty-cycle is 0%, but NAFSA can manufacture any intermediate duty-cycle from 0 to 0, but the viability depends on the model and the voltage associated with it. For any special requeriment, please ask NAFSA. In the VM and VM/ND series the duty-cycle can not be modified. 2. INSULATION CLASS CUSTOMIZATION: In the VEM serie, insulation class can be increased until H (ºC). In the VM and VM/ND, insulation class can be increased until F (ºC).. PROTECTIÓN RATE CUSTOMIZATION IP (EN029): Standard models are IP, but it can be decreased until IP to cheapen production cost. NOTE: All this customizations cannot be applied to all models, ask NAFSA for each case. 0

However, there is the possibility of customizing them to suit

See below some of the most common customizations.

possibility and the minimum manufacturing batch required. 4.

depends on the model. For any special requeriment, ask NAFSA.

on ø have been made Example:VEM0RB Mx hole has been modified

attraction face Example: VEM0CCA Connector from fastening

postioner M-ball postioner Example:CPL-42x Holding plate ø42x

Example: VEM0/CP/ Customized antiremanence pin Example:

3 Holding electromagnets CUSTOMIZATION: Holding electromagnets The models described in the catalogue are standard and minimum manufacturing batches are not required. However, there is the possibility of customizing them to suit better customer's needs. See below some of the most common customizations. If any modification is needed, please ask NAFSA about the possibility and the minimum manufacturing batch required. 4. MECHANICAL CUSTOMIZATION: The viability of the modifications depends on the model. For any special requeriment, ask NAFSA. 4.) Fastening holes modifcation: Example:VEM0M M4 hole has been modified to M 4.2) Non-rotating holes integration: Example:VEME Three M holes on ø have been made Example:VEM0RB Mx hole has been modified by passant M hole Example: Two hole have been added Example: VEM0G ø2, hole has been added 4.) Cable or connector position modification: Example: VEM0D Cables from fastening face 4.4) Carcase shape modification: 4 milled at 90º on the attraction face Example: VEM0CCA Connector from fastening face Example: VEMVC V-shaped milling 4.) Antiremanence pins: 4.) Holding plate fabrication: Example: VEM0/RB with M-ball postioner M-ball postioner Example:CPL-42x Holding plate ø42x with M- hole Example: VEMCP Holding plate with damping washer Example: VEM0/CP/ Customized antiremanence pin Example: VEM0CP/2 Holding plate with ball joint Example: VEMCP/2 Holding plate with damping washer on support 4.) Position detection system: Example: VEM0ASAB Proximity sensor integrated and protected with overmolding Example: VMNDFM Microruptor screwed in the carcase Example: VEMDT Magnetic sensor NOTE: All this customizations cannot be applied to all models, ask NAFSA for each case.

The attraction and holding of the magnetic pieces are obtained feeding the winding inside the solenoid. When the power supply stops the electromagnet looses the piece.

The connector () has 4 possibilities of direction (4x90º) and it is possible to be incorporated to the same diodes of rectification for alterning current connection (AC).

M-4 M-4 M- M- M- M- M- M- C±0. D E F 2 2 0 4 2 2 24 ----------2 2 4 9 -- 4 9 Weight(Kg) 0.02 0.0 0. 0. 0.0 0..0 2.

4 The attraction and holding of the magnetic pieces are obtained feeding the winding inside the solenoid. When the power supply stops the electromagnet looses the piece. When working with loads security norms must be respected. Flying leads for every size. Supply possibilities under demand:.with campling screw from the VEM.With connector from the VEM. The connector () has 4 possibilities of direction (4x90º) and it is possible to be incorporated to the same diodes of rectification for alterning current connection (AC). Flying leads: Ref: VEM (type)-v - ED% Example: VEM -24Vdc- ED0% Table VEM VEM VEM 0 VEM VEM 0 VEM VEM VEM 0 VEM 0 Clamping screw (B): Ref: VEM(type)/B-V-ED% Example: VEM0/B-24Vdc-ED0% B M- M-4 M-4 M- M- M- M- M- M- C±0. D E F Weight(Kg) Table 2 Connector (C): Ref: VEM (type)/c-v-ed% Example: VEM/C-24Vdc ED0% Connection: see documentation that is enclosed with the material øa (-0,) P at ºC e (mm) (W) 0 4. VEM. 2 2 VEM.2 4 VEM VEM. 0 VEM VEM 9 VEM VEM VEM0 0 4 e (mm): Thickness of the piece to hold Air gap (mm) 0, , dl 0, Magnetic Force Fm (N) Protection rate: IP Insulation class: B (0ºC) Standard voltage: 24 VDC Standard duty cycle: ED0% Other voltages,ed and sizes: Consult Round holding electromagnets VEM SERIE The table 2 gives for each type of holding magnet, the values of the force of maintenance (Fm) based on the air gap, measured in the following conditions: -Direct current supply. -Flat piece (mm rugosity) in AºSt, thickness as shown in the table 2 and dimensions are similar or bigger than the attraction face. -Room temperature ºC. At different conditions, the magnetic force(fm) may decrease.the value of the magnetic remanence after the power supply stops is % of the holding force. Important: the clamping screw does not have to exceed measure D.Earthing is recommended if the metallic parts are accessible..technical explanation: see documents.4 &..Under demand: any size, voltage, duty cycle etc can be manufactured. When lifting or handling heavy loads a minimun security margin of must be respected, the weight of the load cannot exceed % of the magnetic force. 2

Rectangular holding electromagnets www.nafsa.es ERM SERIE The attraction and holding of the magnetic pieces are obtained by feeding the winding inside the solenoid.

Protection rate: IP Insulation class: B (0ºC) Nominal Voltage: 24VDC Standard duty cycle: ED0% Other voltages, ED and sizes: Consult Table A B C D E F H Nº of holes Compresion gland Weight(kg) ERM0/

5 Rectangular holding electromagnets ERM SERIE The attraction and holding of the magnetic pieces are obtained by feeding the winding inside the solenoid. When the power supply stops, the solenoid looses the piece. When working with loads, security norms must be respected. Protection rate: IP Insulation class: B (0ºC) Nominal Voltage: 24VDC Standard duty cycle: ED0% Other voltages, ED and sizes: Consult Table A B C D E F H Nº of holes Compresion gland Weight(kg) ERM0/ ERM0/ ERM0/ 2 4. ERM0/ 4 ±0. 4± M- PG-9 2. ERM00/ 2. ERM00/ ERM0/ ERM0/0 0±0. 49.±0.2 2 M- 2 PG- ERM00/ Table 2 P at ºC (W) ERM0/ ERM0/ 4 ERM0/ ERM0/ 0 ERM00/ 4 ERM00/ ERM0/0 ERM0/0 ERM00/0 e (mm) Airgap (mm) 0 0, 0,2 0, The table 2 gives for each type of holding magnet, the values of the force of maintenance (Fm) based on the air gap, measured in the following conditions: -Direct current supply. -Flat piece (µ m rugosity) in AºSt, thickness as shown in the table 2 and dimensions are similar or bigger than the attraction face. -Room temperature ºC. At different conditions, the magnetic force(fm) may decrease.the value of the magnetic remanence after the power supply stops is % of the holding force. - Alternating current connection (AC): Only for sizes ERM0/0 to ERM00/0. - Earthing is recommended if the metallic parts are accessible. - Mounting, supply possibilities and ordering code: to see. - Technical explanations: to see documents.4 and. - Under demand: any size, voltage, duty cycle etc can be manufactured Ordering code: Size; Voltage; Duty cycle Example: Ref.: ERM0/ 24Vdc 0% To other configurations see document 2. e= Thickness of the piece to hold When lifting or handling heavy loads a minimumsecurity margin of must be respected, the weight of the load cannot exceed % of the magnetic force. Magnetic force Fm (N)

ERM --/ Supply possibilities 2xº connector A)Connector (Standard) B)Stuffing box (under demand) Standard mounting Opcional mounting under demand Connector and stuffing box different positions

(Under demand) ERM --/0 Supply possibilities A)Connector (Standard) 4x90º connector B)Stuffing box (Under demand) Optional mounting under demand Connector and stuffing box different positions

6 ERM --/ Supply possibilities 2xº connector A)Connector (Standard) B)Stuffing box (under demand) Standard mounting Opcional mounting under demand Connector and stuffing box different positions )Standard mounting 2)Face opposite to standard mounting (Under demand) Rectangular holding electromagnets Mounting and supply possibilities for rectangular holding electromagnet )Fastening face (Under demand) ERM --/0 Supply possibilities A)Connector (Standard) 4x90º connector B)Stuffing box (Under demand) Optional mounting under demand Connector and stuffing box different positions )Standard mounting 2)Face opposite to standard mounting (Under demand) )Longitudinal output (Under demand) 4)Fastening face (Under demand) Ordering code: Size; Supply possibilities; Positioning; Voltage; Duty-cycle; Example: ERM0/ A2 24Vdc 0% (Connector in the opposite face to standard mounting) ERM0/0 B4 24Vdc 0% (Stuffing box in the mooring face) IMPORTANT: Under demand orders can be delayed in the delivery 4

VM SERIE The attraction and holding of magnetic pieces are made by permanent magnets mounted in the electromagnet, with these kind of products we avoid the risk of load falling down due to sudden

when working with suspended loads, security norms must be respected.

7 VM SERIE The attraction and holding of magnetic pieces are made by permanent magnets mounted in the electromagnet, with these kind of products we avoid the risk of load falling down due to sudden power supply failure.the power supply on the coil allows to loose the load, when this power supply stops, the product recovers its initial force.when working with suspended loads, security norms must be respected. Protection rate: IP Insulation class: B (0ºC) Standard voltage: 24VDC Standard duty cycle: ED0% Different voltage, ED or size: Consult Flying leads for every size Supply possibilities under demand:.with campling screw from the VM.With connector from the VM. The connector () has 4 possibilities of direction (4x90º) and it is possible to be incorporated to the same diodes of rectification for alterning current connection (AC). Flying leads: Ref: VM (type)-v - ED% Example: VM 0-24Vdc- ED0% Table øa (-0,) VM VM VM 0 VM VM 0 VM VM VM 0 VM Clamping screw (B): Ref: VM(type)/B-V-ED% Example: VM0/B-24Vdc-ED0% Important: the clamping screw does not have to exceed measure D M- M-4 M-4 M- M- M- M- M- M- C±0. D E F Weight(Kg) Table 2 Connector (C): Ref: VM (type)/c-v-ed% Example: VM/C-24Vdc ED0% Connection: see documentation that is enclosed with the material B P at ºC (W) VM 2. VM 4. VM0 4. VM VM0 VM 4 VM VM0 VM0 4 Thickness of the piece to hold (mm) Air gap (mm) dl Magnetic Force Fm (N) Round magnetic holding electromagnets The table 2 gives for each type of holding magnet, the values of the force of maintenance (Fm) based on the air gap, measured in the following conditions: -Holding magnet without voltage. -Flat piece (µ m rugosity) in AºSt, thickness as shown in the table 2 and dimensions are similar or bigger than the attraction face. -Room temperature ºC. At different conditions, the magnetic force(fm) may decrease.the value of the magnetic remanence after the power supply stops is % of the holding force.. Earthing is recommended if the metallic parts are accessible..technical explanation: see documents.4 &..Under demand: any size, voltage, duty cycle etc can be manufactured. When lifting or handling heavy loads a minimum security margin of must be respected, the weight of the load cannot exceed % of the magnetic force.

Round magnetic holding electromagnets VM/ND SERIE The attraction and holding of the magnetic pieces are made by permanent magnets mounted in the solenoid.

The power supply on the coil allows to loose the load, when this power supply stops, the product recovers its initial force. When working with suspended loads, security norms must be respected.

8 Round magnetic holding electromagnets VM/ND SERIE The attraction and holding of the magnetic pieces are made by permanent magnets mounted in the solenoid. With these kind of products, we avoid the risk of load falling due to sudden power supply failure. The power supply on the coil allows to loose the load, when this power supply stops, the product recovers its initial force. When working with suspended loads, security norms must be respected. Supply possibilities: Flying leads for every size: VM/ND, VM0/ND, VM/ND: x0.mm2 VM0/ND, VM/ND, VM0/ND: x0.mm2 VM0/ND: 2x0.mm2 Under demand: any size, voltage, duty cycle etc can be manufactured Table øa (-0,) B C(±0,) D E VM /ND M VM 0/ND 0 M VM /ND M VM 0/ND 0 M VM /ND M VM 0/ND 0 M VM 0/ND 0 M- 2. Table 2 (W) E D Minimum pulse (ms) (%) VM/ND 24 VM0/ND VM/ND 42 VM0/ND P Flying leads Feeding mode to take off the workpiece: Voltage: 24Vdc Polarization: Red lead +VDC / Black lead -VDC Important: the clamping screw does not have to exceed measure D Weight(Kg) Resting time (ms) e Air gap (mm) dl (mm) ,2 0,,,, VM/ND VM0/ND VM0/ND Magnetic force Fm (N) Protection rate: IP Insulation class: Y (90ºC) Standard voltage: 24VDC Standard duty cycle: See chart Different voltage, ED or size: Consult e (mm): Thickness of the piece to hold The table 2 gives for each type of holding magnet, the values of the minimum pulse time and resting time measured in the following conditions: - With a weight of % of the maximum magnetic force made by each model The table 2 gives for each type of holding magnet, the values of the force of maintenance (Fm) based on the air gap, measured in the following conditions: -Holding magnet without voltage. -Flat piece (mm rugosity) in AºSt, thickness as shown in the table 2 and dimensions are similar or bigger than the attraction face. -Room temperature ºC. At different conditions, the magnetic force(fm) may decrease. The value of the magnetic remanence after the power supply stops is % of the holding force..earthing is recommended if the metallic parts are accessible..technical explanation: see documents.4 &..Under demand: any size, voltage, duty cycle etc can be manufactured. Under demand an internal protection can be added to the coil to protect it of the overheating, generated by the no respecting of the times given by the duty cycles, this overheating can demagnetize the internal magnet or destroy the coil changing the proper working of holding magnet. When lifting or handling heavy loads a minimum security margin of must be respected, the weight of the load cannot exceed % of the magnetic force. Ordering code : VM--/ND --V ED---% Example : VM0/ND ; Standard voltage : 24Vdc ; Duty cycle : ED% ; Ref.: VM0/ND 24Vdc ED% Example 2: VM0/ND with protection ; Standard voltage : 24Vdc ; Duty cycle : ED% ; Ref.: VM0/ND_WP 24Vdc ED%

Rectangular magnetic holding electromagnets www.nafsa.es ERMI0/0 The attraction and holding of the magnetic pieces are made by permanent magnets mounted in the solenoid.

9 Rectangular magnetic holding electromagnets ERMI0/0 The attraction and holding of the magnetic pieces are made by permanent magnets mounted in the solenoid. With these kind of products, we avoid the risk of load falling due to sudden power supply failure. The power supply on the coil allows to loose the load, when this power supply stops, the product recovers its initial force. When working with suspended loads, security norms must be respected. Protection rate: IP Insulation class: Y (90ºC) Standard voltage: 24VDC Standard power: 0W Standard duty-cycle: ED% Solenoid weight: 4. kg Supply possibilities: - Connector standard - Alternating current connection (AC): The connector offers the possibility of incorporating rectifying diodes - Under demand: other possibilities of input can be manufactured. If any changes from the original (see drawing), please contact. - Electric connection of the connector: see documentation that is enclosed with the material - Earthing is recommended if the metallic parts are accessible. - Technical explanations: see documents.4 &. Table Thickness of the Air gap (mm) dl piece to hold(mm) Magnetic Force Fm (N) For these holding electromagnet correct working the minimum pulse and resting time must be respected: - Minimum pulse time: 00ms - Minimum resting time: 000ms The values of the minimum pulse time and resting time measured in the following conditions: - Coil working on its regime temperature. - Piece weight: 2 kilos (it is not recommended to use these holding electromagnet for lower weights) The table 2 gives for each type of holding magnet, the values of the force of maintenance (Fm) based on the air gap, measured in the following conditions: -Holding electromagnet without voltage. -Flat piece (µ m rugosity) in AºSt, thickness as shown in the table 2 and dimensions are similar or bigger than the attraction face. -Room temperature ºC. At different conditions, the magnetic force(fm) may decrease.the value of the magnetic remanence after the power supply stops is % of the holding force. When lifting or handling heavy loads a minimum security margin of must be respected, the weight of the load cannot exceed % of the magnetic force. Ordering code: Ref.: ERMI0/0 24Vdc ED%

BP00/0 It is a bipolar holding electromagnet whith00mm of effective surface. The face is made with an angle to work with different pieces between ø mm y ø0 mm.

When working with loads security norms must be respected. Protection rate: IP Insulation class: B (0ºC) Standard voltage: 24Vdc Standard duty cycle ED: 0% Abs.

current the electromagnet will have an external rectifier. ø-ø0 ø0.4 0 00 2)It can be manufactured at any voltage, duty cycle, connection etc. Also other sizes for different applications.

10 BP00/0 It is a bipolar holding electromagnet whith00mm of effective surface. The face is made with an angle to work with different pieces between ø mm y ø0 mm. The attraction and holding of the magnetic pieces is obtained by feeding the coil inside the electromagnet. When the power supply stops the electromagnet looses the piece. When working with loads security norms must be respected. Protection rate: IP Insulation class: B (0ºC) Standard voltage: 24Vdc Standard duty cycle ED: 0% Abs. power at ºC: 2 W Temperature rise "DV" ºC Solenoid weight: 4 Kg Bipolar holding electromagnets Maximum keeping force ø Round bar (mm) Force N/mm Force N (for bar => 00mm) )To feed in alterning current the electromagnet will have an external rectifier. ø-ø0 ø )It can be manufactured at any voltage, duty cycle, connection etc. Also other sizes for different applications. The forces values are obtained with the electromagnet at its working temperature and with the piece to be held in contact with whole attraction surface General dimensions )Ground connection is recommended if to the metallic parts are accessible. When lifting or handling heavy loads a minimum security margin of must be respected, the weight of the load cannot exceed % of the magnetic force. Ordering code: BP00/0 --V ED---% Example: Standard voltage:24vdc Duty-cycle: ED0%: BP00/0 24Vdc ED0% NAFSA

VEM ; ERM ; VM ; VM/ND ; ERMI ; BP series

www.nafsa.es Holding electromagnets VEM ; ERM ; VM ; VM/ND ; ERMI ; BP series Revision: /205 Technical explanation: Holding electromagnets Every product made by NAFSA fulfils the European Directive about