500W Diesel Injector Dedicated Adjustable Power Supply – Accurate & Durable

In a diesel injector test bench, the solenoid is energised by a DC voltage that must be stable and repeatable. If the voltage varies, the solenoid's pull-in time varies, and the injection quantity changes. The result is a test result that is not repeatable - the same injector will produce different results on different days. The 500W adjustable DC power supply is a stabilised voltage source that delivers a constant voltage, regardless of the load or the mains fluctuations. It is the power supply that eliminates the variability in injector testing, ensuring that the test results are repeatable and accurate.

The injector solenoid is an inductive load - it draws a high current when it is first energised, and the current drops as the magnetic field builds. If the power supply is not regulated, the voltage drops when the current is high, and the solenoid's pull-in time is longer. The injection quantity is reduced, and the test result is incorrect. The 500W adjustable DC power supply addresses this with a regulated output that maintains the voltage within ±0.1 % of the set value, regardless of the load. The supply uses a switching regulator with a high-frequency transformer that provides a fast transient response - the voltage recovers within 100 µs after a load step.

The 500W adjustable DC power supply is used in diesel injector testing, commonly found in:

Bosch common-rail injector test benches

Denso common-rail injector test benches

Delphi common-rail injector test benches

Siemens common-rail injector test benches

Caterpillar HEUI injector test benches

Cummins injector test benches

The supply is also used in the following applications:

Injector solenoid testing - measuring the pull-in time and the hold current

Injector driver testing - testing the ECU's injector driver circuits

Injector coil resistance measurement - using a four-wire measurement

Injector leakage testing - measuring the leakage current

Injector response time testing - measuring the opening and closing times

Solenoid valve testing - testing the solenoid valves used in the fuel system

The power supply is designed for workshop use, with a rugged metal case and a front panel that is protected against dust and moisture.

The 500W adjustable DC power supply uses a switching regulator with a high-frequency transformer. The input voltage (110-240 V AC) is rectified and filtered, and the DC voltage is switched at a high frequency (100 kHz) by a MOSFET. The switched voltage is transformed to the output voltage, rectified and filtered, and the output voltage is regulated by a feedback loop that compares the output voltage to a reference voltage. The output voltage is adjustable from 0 to 30 V, and the output current is adjustable from 0 to 20 A. The supply has a constant voltage (CV) mode and a constant current (CC) mode - the output voltage is constant in CV mode, and the output current is constant in CC mode. The supply has a digital display that shows the output voltage and the output current, and it has a rotary knob that adjusts the output voltage and the output current.

The most common failure is a blown fuse - the fuse protects the supply against overcurrent and short circuits. The second most common failure is a failed fan - the fan cools the supply, and if it fails, the supply overheats. The third most common failure is a failed output capacitor - the capacitor filters the output voltage, and if it fails, the output ripple increases.

Q1: How does the 500W power supply compare to a standard power supply? → The 500W power supply has a regulated output, a low ripple, and a fast transient response - the standard power supply does not.

Q2: Can I use the supply on a different injector? → The supply is universal - it works on any injector.

Q3: Does the supply include the test leads? → The supply includes the test leads with alligator clips.

Q4: What is the warranty on the supply? → The supply has a 12-month warranty.

Q5: Can I use the supply for other applications? → The supply can be used for any application that requires a regulated DC voltage.

Q6: What is the output ripple of the supply? → The output ripple is less than 5 mV RMS.

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