Varied DC Power Supply

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Varied DC Power Supply VARIED｜Suzhou high‑tech enterprise🏭
Specialized in programmable DC power, regenerative load & simulation test systems.

Standard & custom solutions for EV, energy storage, fuel cell. Global supply｜Pre‑sales support & full after‑sales service

💡 Case Study | Powering SiC Burn-in Testing: 2400V High-Voltage & 10mA Micro-CurrentWe recently partnered with a client ...
21/10/2026

💡 Case Study | Powering SiC Burn-in Testing: 2400V High-Voltage & 10mA Micro-Current
We recently partnered with a client in the semiconductor industry to solve a challenging testing requirement for SiC (Silicon Carbide) chips. Sharing a quick look at our solution and the selection logic behind it:
🔍 The Challenge:
The client needed to conduct static burn-in (HTOL) for SiC chips inside a 125°C oven. The testing profile was extreme: requiring a bias voltage of 600–2400V with an operating current of only 10mA. This high-voltage, low-current scenario demanded exceptional precision, stability, and safety from the power supply.
🛠️ The VARIED Solution:
We recommended the RU-D-20001 / RU-D-30001 programmable power supplies, configured in a "1-to-1" architecture (1 power supply driving 1 burn-in board).
Precise HV Regulation: Seamlessly covers 600–2400V for extreme bias conditions.
Stable Micro-Current: Zero drift, high stability, and low ripple at a 10mA operating current.
Endurance & Protection: Supports 7×24h continuous operation for hundreds of hours, with fast latch-off OVP, OCP, and arc protection to prevent mass chip burnout.
✨ Why the "1-to-1" Architecture?
In semiconductor burn-in lines, independent control is key. A single power supply driving one board ensures fault isolation—if one board fails, it won't affect the rest of the batch. This makes isolating failed components easy and enables reliable unattended monitoring.
Looking for a reliable power solution for your high-voltage or long-cycle testing applications? Let's connect! 👇


💥 Motor Power Supply & Burn-in Test for Automatic Slide Rail Crimping MachineThis case adopts our programmable DC power ...
16/10/2026

💥 Motor Power Supply & Burn-in Test for Automatic Slide Rail Crimping Machine

This case adopts our programmable DC power supply RU-12-40300, featuring low voltage and high current output. It supplies power for the motor of automatic slide rail crimping machine and performs 24h non-stop burn-in test to validate motor long-run stability.

🚀 Device Under Test (DUT): Motor of automatic slide rail crimping machine

🚀 Testing Equipment: RU-12-40300

Power Supply Functional Requirements: Low voltage & high current output, support non-stop long-time operation

🚀 Test Purpose
Supply power to the motor of automatic slide rail crimping machine and carry out 24-hour non-stop burn-in test, to verify the stability of the motor under long-term continuous operation.

🚀 Test Procedure
The RU-12-40300 DC power supply outputs low voltage and high current to continuously power the crimping machine motor. The whole system runs non-stop for 24 hours to simulate long-term operating conditions of the motor. Monitor the continuous working status and check whether the motor can operate stably under long-hour power-on conditions.

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Helicopter Starter Motor Performance Test and Maintenance VerificationWe supply programmable DC power supply for helicop...
15/10/2026

Helicopter Starter Motor Performance Test and Maintenance Verification

We supply programmable DC power supply for helicopter starter motor performance test & maintenance verification. The power source supports high peak current output, flexible parameter customization to simulate real working voltage conditions, and measure motor current, torque and rotation speed.

Device Under Test (DUT): Helicopter starter motor

Test Equipment:
Programmable DC Power Supply RU-W360-361000
Functional Requirements of Test Power Supply: It can output 48V/600A and support high peak current up to 1000A; also capable of 1800V/10A output. Voltage and current parameters can be customized flexibly with stable output to meet short-time high-current impulse test of the motor.

Test Purpose:
Verify the performance of helicopter starter motor after maintenance, test the motor starting characteristics, collect key parameters such as operating current, torque and rotating speed to check whether the motor meets working requirements.
Test Process: Conduct test for 1~2 minutes under 28.5V working condition, then switch to 32V condition. The power supply continuously feeds power to the motor to simulate real operating environment, synchronously record motor operating current, torque and rotation speed data to evaluate the starting performance of the motor.

Cyclic testing of robot arm motorsDevice Under Test（DUT): Servo Motors and Controllers (Humanoid/Quadruped Bionic Robots...
10/10/2026

Cyclic testing of robot arm motors

Device Under Test（DUT): Servo Motors and Controllers (Humanoid/Quadruped Bionic Robots)

The testing equipment used: RU-60-10060 Programmable DC power supply
Test Type: Endurance / Cycle life test

Test requirements:
The power supply should be used at a constant voltage, and the motor should be tested. The maximum voltage used is 72V. A 100V product was selected. It has reverse current, so a discharge function needs to be added

Test purpose:
To conduct endurance/cyclic operation tests on robot motors, continuously monitor the power supply's operating status, test duration, and number of cycles throughout the entire test cycle; during motor operation, reverse feedback energy is generated, therefore the power supply needs to be equipped with testing functions to absorb reverse current, while relying on communication and compensation functions to ensure stable constant voltage power supply, and verify the motor's performance under cyclic operation conditions.

08/10/2026

V61000-Battery testingf unction
The V61000 series bidirectional DC test power supply is equipped with battery charging and discharging functions. By setting the charging or discharging mode, it can perform constant voltage charging and discharging, constant current charging and discharging, and constant resistance discharging. It can conduct charging and discharging tests on battery cells or battery packs and introduce them. The CSV file is generated to simulate the operating conditions of the new energy vehicle power system and conduct condition simulation tests on the battery PACK.

DC power supply-Customer Case sharingTest Object: Domain Controllers, Cockpit ControllersThe testing equipment used: R...
29/09/2026

DC power supply-Customer Case sharing
Test Object: Domain Controllers, Cockpit Controllers
The testing equipment used: RU-3060; RU-30120
Test Type: Domain Controller Test Power Supply (Communication Control, Constant-voltage Supply)

Test Process:
The power supply provides constant-voltage (CV) power, typically delivering 13.5 V, and communicates with the customer's host PC over a communication link to control constant-voltage supply to the domain controller. A domain controller consists of a main controller unit with multiple control subunits corresponding to various vehicle components (e.g., windows, seats, power tailgate). An integrated test bench sends commands to check communication between each subunit, then verifies the operation of each component — for example, window opening/closing degree versus the corresponding energization duration. The power supply continuously simulates an automotive starting battery by providing a stable DC voltage. Small-power controllers generally do not require a bidirectional power supply; however, if the controller is connected to a steering motor, a bidirectional power supply may be needed during actual testing.

clients’requirement
The power supply is equipped with programmable control functions (485, LAN,CAN) and can be used at constant voltage.

Integrated Source-Load Test Case for High-Power Step-up/Step-down DC/DC Converters with VEADTest Object: DC/DC Converter...
23/09/2026

Integrated Source-Load Test Case for High-Power Step-up/Step-down DC/DC Converters with VEAD

Test Object: DC/DC Converters (Step-up DC/DC, Step-down DC/DC)
The testing equipment used: VEAD 5-200V 200A 40KW*2、20-1000V 400A100KW*2
Test Type: High-power DC/DC Converter DC Supply and Loading Test (Integrated Source-Load, CAN Communication, Arbitrary Bidirectional Output Switching

Test Process:
Power supply operating mode: switched between CV/CC modes per the DUT requirements. Test duration: for LV DCDC, loading steps of 5/15/25/35/50/80/100% with a total test time of 30 min and time proportions of 5/20/20/20/18/15/2%; for HV DCDC, loading steps of 20/40/60/80/100% with a total test time of 30 min and time proportions of 10/15/20/25/30%. Cycle count: total test duration of 2–1000 h, with voltage and current values recorded every 0.5 h. Test items: input side — efficiency, rated power, voltage error, current error, overshoot recovery, output ripple; protection functions — input over/undervoltage protection, output over/undervoltage protection, output short-circuit protection, and over-temperature protection.

Effect:
The integrated source-load equipment can be configured as unidirectional source + bidirectional load, or bidirectional source + bidirectional load. High- and low-voltage sides can be freely allocated with automatic switching. High stability, capable of running at the power conditions required by the test protocol. Strong expandability for future capacity upgrades and secondary communication development.

DC/DC Module Input DC Supply Testing: Long-duration Load Endurance and CalibrationTest Object：HV/LV DC/DC Converters (DC...
22/09/2026

DC/DC Module Input DC Supply Testing: Long-duration Load Endurance and Calibration

Test Object：HV/LV DC/DC Converters (DC/DC Modules)
The testing equipment used:RU-18-3060;RU-18-6030;RU-36-30012;RU-60-60010
Test Type :DC/DC Module Input DC Supply (Long-duration Load, Endurance/Calibration Testing)

Test Process：

Power supply operating mode: switched between CV/CC modes per the DUT requirements. Test duration: executed step by step via ATE automated testing, with each step lasting 1–10 s. Cycle count: endurance tests maintain CC/CV mode in an environmental chamber for 100–3000 h; calibration tests typically run 2–5 cycles. Test items: input voltage, input current, current ripple, output voltage, output voltage range (rated voltage regulation in both directions), output temperature drift, output current, output power, output voltage ripple, voltage regulation, current regulation, efficiency, line regulation, response time, and input/output voltage and current protection.

Effect:

1. Comprehensive DC power supply lineup covering both high-voltage and low-voltage models;

2. Supports multi-channel communication and parallel operation, with optional multi-channel remote control software;

3. Modular design, configurable for rack mounting and parallel integration with environmental chambers;

4. Supports continuous full-power operation with high stability.

Testing a PTC heater? Do not size by kW alone.PTC testing needs sustained constant-current stability through hours of ho...
22/09/2026

Testing a PTC heater? Do not size by kW alone.
PTC testing needs sustained constant-current stability through hours of hot/cold cycling, not just peak kW.

A PTC heater is nasty on a supply: full power for the entire warm-up, then repeated start-stop thermal cycles.

That great-on-paper DC supply? Run it at full load for 6 hours and watch the voltage drift. Watch it derate as the cabinet heats up. Your temperature-rise data is now fiction.

Three things your PTC supply must do:
- Hold constant current for hours, not minutes
- Ride through simulated vehicle voltage dips without tripping
- Cover 12V/24V with programmable hot/cold sequences

Who has burned a PTC durability run because the supply drifted? Wave below.

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Building 6, No. 179, Zhujiawan Street, GusuDistrict, Jiangsu
Suzhou
215000

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