CHROMA ATE INC. Programmable AC Source 61500/61600 Series Product Manager: Galen Chou
Chroma AC Source Family
Outline 1. What is programmable AC source? 2. What is user s need? 3. What do they test with AC source? 4. Functions of Chroma AC sources
A Primitive AC Source 1. Not easy to setup 2. Inconvenient to use 3. No protection Power Meter Function Generator Power Amplifier Transformer C C
AC Source Structure AC Input Input Stage Power Stage Output Stage AC Output Waveform Generator, Control and Measurement Units User Interface User
AC Source Power Stages Linear type, a transformer on output, high impedance Line Input A/D Power Stage D/A Power Stage AC Output A transformer on input, weight is heavy Line Input A/D Power Stage D/A Power Stage AC Output
Chroma s AC Source Advantage Chroma Line Input A/D Power Stage D/D Power Stage D/A Power Stage AC Output 1. No low -frequency transformer, lighter than others 2. Standard PFC input, save power and less interference to main 3. No transformer on output, low impedance
Chroma s AC Source Advantage Output impedance: Zo = Ro + Lo High impedance: Voltage drop, Current inhibit, High frequency current filter, not good for testing IEC61000-3-2 The lab doesn t use the AC source with a transformer on output. Zo AC Source
What is users need? Basic : (61500/61600 Series) 1. Clean, pure and stable sine waveform AC power 2. Measurement : Power, voltage, current Monitor 3. Line regulation test (90 264V, 47-63Hz) 4. Simulation mains for all power systems in the world 230V/50Hz, 120V/60Hz, 100V/50Hz 5. Auto-test (Remote control)
What is users need? How much power of AC source dose user need? Example: Test 300W (output) power supply 1. Ask the efficiency: Input power = 300W/0.8 = 375W 2. Ask the Power Factor: Input VA = 375/0.75 = 500VA 3. Ask if test OPT: Max VA = 500VA x 1.3 = 650VA 4. Ask the low line : Max input current : 650VA/90V = 7.22A At least, the customer needs 61502/61602 (1KW) 5. Ask the inrush current: If 45Apeak is needed at 230V, then he needs 61504/61604 (2KW)
What is users need? Additional : (61500/61600 series) 1. Power Turn ON/OFF phase angle Setting 90 Turn ON for inrush current test. 2. Inrush Current Measurement (Delay time, Interval) 3. Voltage/Frequency Slew Rate Setting a. Operate for range scanning (90V-264V 或 47H 63Hz ) b. Raising the voltage gradually, power on UUT with less inrush current 4. Voltage/Frequency Save and Recall ( One-key Recall)
61500/61600 Softpanel Function Auto Run: Programming for long time test (On/Off or Burn-in)
61500/61600 Softpanel Function Report Function : Data Recording stored in a File
What else is users need? Only testing the specification of input power is not enough to verify the UUT. Simulating the power like real world is the way to get better quality and stability. Advance Test : (61500 series only) 1. Transient Voltage Simulation 2. Distorted Waveform Simulation
Transient Output Different kind of transient output: Surge Sag Frequency Variation Cycle Dropout
Influence of Transient Output Example : Power supply of DVD player +5V to memory +3.3V to CPU +12V to driver When cycle dropout occurs, output voltage will drop then back to normal level. The machine might shut down because of improper dropping rate of voltage. (Memory might be reset, but CPU might work as usual. )
Example for Transient Output Test Cycle Drop Out Test Brown Out Test
Regulation for Transient Output IEC 61000-4-11 : Voltage dips, short interruptions and voltage variation immunity tests dip short 100%UT voltage variation 40%UT 0%UT t (sec)
Regulation for Transient Output IEC 61000-4-14 : Voltage fluctuation immunity test Un 60s Un + 10%Un 60s 60s Un - 10%Un 60s 5s±0.5s ΔU 5 periods 2s±0.2s 5 periods
Regulation for Transient Output IEC 61000-4-28 : Variation of power frequency immunity test f1+δf 120s f1 tp tp 60s 60s tp tp f1 120s f1-δf f1 tp f1+δf
61500 AC Source Functions for Transient Output LIST Mode: Program output waveform sequence by sequence
61500 AC Source Functions for Transient Output PULSE Mode: Insert a waveform into normal voltage
61500 AC Source Functions for Transient Output STEP Mode : Change from an initial voltage to destination step by step
Transient Output with High Voltage A transient high voltage of main will damage the electrical products. (It happens usually in China and India.) Many companies have asked it as a standard test item. Chroma solution: Model 6560, or 2 units connecting in series. 220V 400V/0.5sec
Transient Output with High Voltage 2 units of AC Source with synchronizing signal: Use 3-phase Mode, 61500/61600 as the Master, 61500 as the Slave. Master: Fixed Mode 220V L 220V with 400V/0.5s transient N L Slave: List Mode 180V/0.5 sec L N UUT N
2 Units of AC Source Application The voltage resonance happens when EMI filter plugs into the main. Using AC Source to simulate the disturbance effect.
Combine 3 Units of AC Sources Chroma 61500/61600 AC Source : 3 units can be combined to a 3-phase AC Power Source (1 Master, 2 Slave units with setting the phase 120 and 240 )
Distorted Waveform Power Plant Power Network Nonlinear load pollutes the mains with distortion current. Pure V Io Distorted V Zo L C Resonance Point Frequency Fr = 1 2Π LC
Distorted Waveform Different kind of distorted waveform: Harmonic Distortion Interharmonic Distortion Clipped Sine Waveform Low frequency drift
Regulation for Distorted Waveform IEC 61000-4-13 : Harmonics, Interharmonics including mains signaling at AC power port immunity tests Flat Curve Sweep Over Swing
Influence of Distorted Waveform Comparing With/Without harmonic component: Same UUT, 2.46A 3.015A, 22% increase
Influence of Distorted Waveform Comparing With/Without interharmonic component: Same UUT, 0.83A 1.3A, 57% increase
Influence of Distorted Waveform With voltage interharmonics component: Fi=30.85Hz, level =7% abnormal current waveform PWM unstable
61500 s Functions for Distorted Waveform SYNTHESIS : Edit harmonic components (Amplitude & Phase) of 40 orders to synthesize a new waveform. (50/60Hz)
61500 s Functions for Distorted Waveform INTERHARMONICS : Add a sweeping frequency component (0.01Hz 2400 Hz) on a normal voltage. It helps to find the resonance point, or the weak point of the UUT.
61500 s Functions for Distorted Waveform WAVEFORM EDITOR : Edit waveform by harmonic orders on softpanel, send the data and save to User Waveform of AC Source. It can be used on every frequency but less accuracy.
Application for AC Power Distortion With the customers or facilities being oversea, the input power problem can t be solved in a short time. Solution: 1. Measure the harmonic components by Power Analyzer on facility. 2. Re-build the waveform by SYNTHESIS function of AC Source, RD or QC can test it on the lab..
Application for AC Power Distortion Measure Harmonic components Re-build Waveform
DC Component of AC Power It contains DC component on some AC power sources, like UPS. 1. Current unbalance. Input rectifier may be damaged. 2. Input transformer saturation (DC current) Using AC Source AC+DC mode to simulate. Without DC component With DC component
DC Output Application of AC Power Use optional unit A615008, DC Noise Filter, when output DC voltage. It can help to decrease the noise, and increase the stability. Connection Method:
Analog Control for AC Source 1. DC Level Control Mode: Use an external DC voltage to control the amplitude of output AC voltage. Frequency is set on AC Source. 10Vdc External input V Output V 424Vdc 212Vdc 300V rms @300V rang 150V rms @150V rang
Analog Control for AC Source 2. AC Amplifier Mode: Send an external signal to AC source and amplify it as the output waveform, just like the user s need. External input V Output V 10 Vdc 424 Vdc @300V rang 212 Vdc @150V rang -10 Vdc -424 Vdc @300V rang -212 Vdc @150V rang
TTL signals of AC Source 1. AC_ON : Up to high level when AC source output. Counting time interval between power-on and normal operation. 2. Synchronize (Transient) : Send a pulse signal when output change. For external trigger or system integration
TTL signals of AC Source 3. Fault : TTL level becomes low when protection occur. For notice or system integration 4. Remote_Inhibit : Inhibit the output when the signal becomes low. External control for system integration. Trigger Live
Regulation Test AC Source offers a pure and stable voltage to UUT. EN61000-3-2 Limits for harmonic current emissions EN61000-3-3 Limitation of voltage fluctuations and flicker Haefely use Chroma AC source as a standard source.
Do you have Questions? For more information on the Chroma 61500 / 61600 Series AC Power Sources or if you would like to purchase one of these models please contact your sales engineer at ValueTronics. 800-552-8258 or 847-468-8258 www.valuetronics.com