Test & Measurement Applications
DC Power Supply for 48V Motor Controller Testing
Bring up a motor controller, vary its DC input and measure its response under load. Adjustable voltage, adequate starting current and a planned braking-energy path make the bench useful from first power-on to repeated drive tests.
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How Does a DC Power Supply Support 48V Motor Controller Testing?
An adjustable DC source feeds the controller during bring-up, input-voltage sweeps and loaded motor tests. Starting demand and braking energy determine how the source fits the complete drive bench.
Power path: DC source → protected DC bus → motor controller → motor and mechanical load.
Braking energy: returned energy requires a rated absorption or dissipation path at the bus. PC control and electrical/mechanical measurements connect separately.
The source supplies the controller DC input. Regenerative braking requires an independently rated absorption or dissipation path; it must not rely on a source-only supply to sink energy.
What to Consider When Choosing a DC Power Supply for 48V Motor Controller Testing
DC bus voltage
Minimum input, nominal 48V operation, maximum test voltage and controller overvoltage threshold.
Starting and loaded current
DC input current during acceleration, steady torque and overload tests; pulse duration and duty cycle.
Braking energy and control
Regenerative current, bus capacitance, output switching, remote setpoints and the measurement sequence.
Light-load bring-up or loaded operation?
A controller can start successfully with the motor unloaded yet draw much more current under torque. Size the source from DC input measurements or controller data, including acceleration duration. Motor phase current is not the same as supply input current.
A 60V range or more voltage headroom?
A 0–60V source can cover nominal 48V tests that stay below 60V. Select a higher-voltage range when the planned input sweep exceeds this, while keeping every test point inside the controller rating. Do not apply the source maximum simply because it is available.
Repeated sweeps or manual adjustments?
Manual CV/CC controls suit initial setup. For repeated voltage steps, choose the required programmable interface and coordinate setpoint settling with data capture. Current limiting can change the test result by pulling down the DC bus.
Compare Power Supplies for This Application
eTM-K6010SPL+ 60V 10A Programmable DC Power Supply
Controlled bring-up and repeatable input sweeps. 0–60V, 0–10A with Window List sequences, Modbus/SCPI and available communication configurations. Suitable when controller input demand stays within this range.
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eTM-6050C 60V 50A 3000W Variable Bench DC Power Supply
Higher-current 48V drive fixtures. 0–60V, 0–50A and 3000W rated output, CV/CC control, low ripple and noise, output switching and temperature-controlled cooling. Programmable interfaces are optional.
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eTM-12030C 120V 30A Variable Bench DC Power Supply
Tests extending beyond a 60V bus. 0–120V, 0–30A adjustment provides a wider voltage window for controller families and input sweeps. Select the AC input and output capability for the required operating point.
View Options & Buy OnlineETOMMENS DC Power Supplies for 48V Motor Controller Testing
Adjustable DC output supports controller bring-up and input-voltage sweeps. The 6050C combines higher current capacity with CV/CC control, low ripple and noise, output switching and temperature-controlled cooling. For repeated sequences, the K6010SPL+ offers stored settings and programmable control; C-series communication interfaces are optional.
ETOMMENS serves small and medium-sized businesses, large enterprises and multinational groups, with customers across North America—including the United States and Canada—Europe and the Middle East.
Our DC power supply range supports laboratory development, equipment testing and production applications, with technical support and customized solutions for different project requirements.
Where to Buy DC Power Supplies for 48V Motor Controller Testing
You can buy ETOMMENS DC power supplies for 48V motor controller testing online at VariableDCPowerSupply.com. In-stock models dispatch within 1–3 business days after payment, with approximately 10 business days in transit. Free worldwide DDP shipping includes customs clearance, import duties and taxes.
Lead times for custom configurations are confirmed with the quotation.
Related: Motor Testing Power Supply.
Frequently Asked Questions
Can a bench supply replace a 48V battery for motor tests?
It can supply a controlled DC input for suitable tests, but its current limit and transient response differ from a battery. Include a separate solution for returned braking energy.
Is a 60V 10A supply enough for my controller?
Only when the complete test, including startup and loaded operation, stays within its voltage, current and power limits. Use DC input demand rather than the motor phase-current label.
Why does the controller reset during acceleration?
A current-limited source or voltage drop in the test leads can pull the bus below the controller undervoltage threshold. Measure voltage at the controller and record input current during startup.
Which model can I purchase online?
The K6010SPL+, 6050C and 12030C product pages provide specifications and available purchase options. Select the required input and interfaces on the relevant product page.