Commonly used testing tools for miniature motors (divided into basic and simple → professional and precise, suitable for daily repair/factory quality inspection)
Miniature motors generally refer to: DC brushed/brushless motors, vibration motors, geared motors, coreless motors, stepper motors, etc. Below is a list categorized as essential, advanced, and professional; simply purchase the tools listed below.
I. Basic Essentials (Sufficient for home/repair use)
1. Digital Multimeter: Measures: DC resistance, continuity, no-load current, voltage, and approximate insulation; determines if the coil is open-circuited or short-circuited.
2. DC Regulated Power Supply: Adjustable voltage and current; supplies power to the motor to check if it rotates, if the speed is normal, if there are any abnormal noises, and detect stall current.
3. Tweezers, Needle-nose pliers, Brush: Cleans carbon powder and dust; checks brush and commutator wear.
4. Tachometer (Photoelectric): Measures no-load/load speed to determine if the motor meets specifications.
II. Advanced Testing (Factory/R&D/Batch Quality Inspection)
1. Oscilloscope: Measures commutation spark waveform, brushless motor Hall signal, back EMF, and noise to diagnose commutation problems and Hall faults.
2. Milliohmmeter (Low Resistance Tester): Micro-motor coil resistance is very low; ordinary multimeters are inaccurate. A milliohmmeter is used to test winding balance and inter-turn short circuits.
3. Inter-turn Impulse Withstand Voltage Tester (Inter-turn Tester): Specifically used to check for inter-turn short circuits in coils; the most commonly used and essential test for micro-motors.
4. Noise Meter and Vibration Tester: Measure abnormal noise and vibration levels to determine if bearing, eccentricity, or assembly problems exist.
5. Hall Signal Tester: For brushless micro-motors, measures Hall phase and ensures normal output.
III. Professional Complete Equipment (Production Line Use)
1. Micro-motor Comprehensive Tester: One-button testing of resistance, current, speed, torque, voltage, insulation, inter-turn, and spark; fully automatic.
2. Torque Tester (Torque Meter): Measures stall torque and rated torque to determine if the output force is up to standard.
3. Insulation Resistance Meter (50V/100V Megohmmeter): Measures the insulation between the winding and the casing, checking for leakage and moisture.
4. Temperature Rise Tester (Thermocouple): Measures temperature during long-term operation to determine overload and coil quality.
IV. Simple Summary (Most Practical Combination)
- Personal Repair: Multimeter + Adjustable Power Supply + Tachometer
- Small Workshop/Bulk Production: Multimeter + Milliohm Meter + Turns Interval Meter + Torque Meter
- R&D/Production: Comprehensive Tester + Oscilloscope + Vibration and Noise Meter
Post time: May-21-2026