Atec 63200 User Manual

Programmable DC Electronic Load

The Chroma Electronic Loads 63200 series are

designed for DC power source, power electron-

ic devices and components testing. The high

power rating, parallel and synchronization

capabilities make them the ideal tool for testing

the high power UUT such as SMR,UPS, bat-

tery, and fuel cell.

The 63200 series offers 10 different models

with power range from 2600 watts to 15600

watts, current from 50A to 1000A and up to

500V input voltage. The 4 load modes setup

provide different load simulations for various

application occasions. The CC/CR modes are

designed to test constant voltage type of power

supply. CV mode is used to test battery charger

and current source, while CP mode is ideal for

battery testing by simulating the real discharge

curve.

The 63200 series can draw its rated current

under very low voltage (1V typical) even under

the highest specified slew rate. This unique fea-

ture guarantees the best loading performance

to a low voltage power supply.

With the unique external waveform simulation

and Master /Slave control capability, the 63200

series electronic loads allow users to parallel

and synchronize more than one load together

from an internal or external loading control sig-

nal. This feature provides unlimited load simula-

tion and the possibility of power expansion.

The 63200 series also supply necessary mea-

surement functions and short circuit simulation

that extend the test capability for even the most

demanding engineering tests and ATE applica-

tions.

With the LCD display and rotary knob, the

63200 electronic loads offer versatile front

panel operations. Users are able to control the

63200 family remotely via GPIB, RS-232C,RS-

485 or APG (Analog Programming) interface.

Chroma 63200 series loads are built in fan

speed control to minimize the audio noise. The

self-diagnosis routine and the full protections

against OPP, OCP, OVP, OTP and reverse

polarity ensure the best quality and reliability.

PROGRAMMABLE

DC ELECTRONIC LOAD

MODEL 63200 SERIES

RS-485

MODEL 63200 SERIES

Key Features:

Power Rating:

2600W,5200W,6500W,10400W,

14500W, 15600W

Voltage range: 1-80V/ 2.5-500V

Current range: Up to 1000A

CC, CR, CV, CP load modes

Master/Slave paralleling control mode,

allow synchronous load control under

static and dynamic loading mode

Dynamic loading: Up to 20KHz

Only need 1V to draw rated current

Programmable slew rate, up to 41A/uS

Measurement: Voltage / Current

Power/ Resistance

Large LED/LCD display

External loading waveform simulation

Short circuit simulation and short

circuit current measurement

Full protection: OP,OC,OV,OT and

reverse protection

Versatile remote controller

GPIB& RS-232C; RS-485 interface

Surge load capability

Battery discharge timer

and therefore can test if the battery charger has correct charging current corresponding to its own output, or more precisely, the battery voltage. If the UUT is battery, the electronic load is able to simulate the behavior of the device that uses the battery. For most of the electronic and electrical devices, their power consumption patterns are more likely constant power devices. Consequently, CP mode simulation will be essential for a battery discharge load.

2. LOW VOLTAGE OPERATING CHARACTERISTICS

For high power load, its high loading current may cause dramatic line drop between UUT and load terminal due to the line impedance of cabling. So, the lower operating voltage allows the 63200 series loads to draw sufficient current from a low volt output power supply directly.

Meanwhile, 63200 series loads use current close loop design, and connect all power MOSFET devices in parallel to insure high accuracy load control with minimum drift less than 0.15% of the current setting. The MOSFET technology accomplishes the input impedance to a minimum that enables the load to draw very high current even at very low voltage. For example, model 63209 is capable of drawing 1000A at only 1V input.

3. MEASUREMENTS

Chroma 63200 series are built in the15-bits precision A/D converter, thus can achieve 0.05%F.S., 0.1%F.S. and 0.3%F.S. accuracy for voltage, current and power measurement respectively. And they can be shown simultaneously on three big LED displays for user's convenience. In additional to standard measurements, they also provide voltage and current monitor outputs, which are useful when user needs to monitor the voltage and current waveform via scope.

4. DYNAMIC LOADING AND CONTROL

Modern electronic devices operate at very high speed, thus,it is important for an electronic load to perform well in the transient and dynamic response of power devices. To satisfy these testing applications, the 63200 loads offer high speed, programmable dynamic load simulation and control capability ever achieved before. The figure below shows the programmable parameters of the 63200 load modules. The programmable slew rate makes the simulation of transient load change demanded by the requirement of real life application possible. The internal waveform generator of 63200 is capable of producing maximum slew rate at 25A/uS (63208), and dynamic cycling up to 20KHz. Its dedicated remote load senses and controls circuit guarantee the minimum waveform distortion during continuous load changes.

5. MASTER / SLAVE PARALLEL CONTROL

When higher power is required,it is common to parallel two electronic loads together to draw higher current. 63200 series high power loads have smart Master / Slave control mode. When the loads are set to Master / Slave mode, users can program the loading (CC mode only) on master unit. The loading current values of the slave units will be calculated and downloaded by master unit automatically. In short, unlike the traditional design, users may consider several load units that work under Master / Slave mode as a single load unit. It simplifies the user operation dramatically.

6. EXTERNAL LOADING WAVEFORM SIMULATION

The 63200 series electronic loads can be controlled by external analog control signal, which is generated by any kind of signals or arbitrary waveform generator. Thus, it is capable of simulating any loading waveforms observed in the field.

The CC and CR mode loading simulation is helpful to test whether the output voltage of the UUT remains stable or regulated under different loading current or resistance conditions. For battery chargers, CV mode may help to change the output voltage of a charger

1. APPLICATION SPECIFIC LOAD SIMULATION

Chroma electronic loads 63200 series provide constant current, constant resistance, constant voltage and constant power modes for various application requirements.

Constant current

Constant resistance

Constant voltage

Constant power

Model 63209(15600W) input characteristics

Rise rate

Load 1

Fall rate

Load 2

T1 T2

XCL,;LB,N;.B’MBNCLV LLXCLMLVMKCMBBV

C545 VB56566NM GH2333 32233 115666

XZHGCZCKVKCKVCXXMLXMCKMKC

XK CV GH VB CV VB

ZXZCXZVCX

XCXK VCVV/ HJJ

XCXVCVV

CVC XD

8. SURGE LOAD CAPABILITY

Chroma’s 63200 Series DC Loads provide a unique surge load simulation capability which allows users to overdrive the loads up to 2.7 times their rated power for short periods. This feature is ideal when the average power require by the UUT is low compared to short-term peak power demands. Plasma Display Panel (PDPs) testing is one typical application, others include battery 3C discharge, breaker & fuse over rating (300% to 1000%) tests, car engine startup simulation and DC motor startup simulation.

The amount of surge loading available using the 63200 loads is related to the initial loading conditions. Figures 1 and 2 show the relationship of initial state (Load_Low under Dynamic mode) and the maximum acceptable overdrive power. Under this operation, the load will display an Over Power Protection Alarm (OPP) and will disable the load current if the user violates the maximum surge load capability showed in the figures.

Note 1 :

The Initial state under Static Mode should last at least 1 second.

Note 2 :

This surge load capability will be regulated by the temperature de-rating characteristics. (Refer to Note 1 in Specifications)

Note 3 :

Examples below assume the use of the Model 63201 load with a continuous rating of 2600W/300A/1-80VDC

9. TIMER FUNCTION FOR BATTERY DISCHARGE TESTING

The 63200 Loads include unique timing & measurement function allowing for precision time settings and measurements in the range of 1s to 99999s. This feature allows users to set a final voltage & timeout value for battery discharge testing and similar applications.

For Example, Figure 3 below shows that the 63200’s internal timer can be initiated automatically when the battery voltage falls below a preset value. The timer will continue counting until the second preset voltage value is reached.

Example 1: STATIC LOADING

The Model 63201 can be overdriven to approximately 5200W (200% of its rated continuous power rating) for 6.0 ms seconds when the starting power is 650W (25% of its rated power). This is represented by DOT on the blue curve in Figure 1.

Example 2: DYNAMIC LOADING

The Model 63201 is capable of a zero – to- 6500W (250%) pulse at a duty cycle of 5%. This is represented by the DOT on the purple curve in Figure 2.

7. SHORT CIRCUIT SIMULATION

63200 series electronic loads can also simulate short circuit condition. Owing to this capability, it can short DC power source or any power supplies that have built in current limit function, and measure their short circuit currents. So that users can verify if the UUT current limit is functional.

APPLICATIONS

1. POWER SUPPLY TESTING

Power supplies have played a critical role on electrical and electronic devices. They are diversified into several different configurations for different applications. For example, AC/AC power supplies are for UPS and AVR, AC/DC power supplies are for PC power supplies, and DC/AC power supplies are for inverters that transfer battery power to AC for home appliances. As to DC/DC converters, they are widely used in battery powered devices such as cellular phones and laptop computers. With four different load modes, Chroma 63200 series electronic loads are capable of testing all sorts of DC output power supplies directly or via rectifier, they can also be used to test the AC output power supplies.

CC & CR Mode

CV Mode

A/ D Power supply D/ D Converter

Battery charger

UPS/AVR

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