Electrical Machine and Electrical Technology Training Kit

This training kit enables integrated, full-process teaching of electrical machines and electrical technologies. It is primarily suitable for teaching courses such as “Electrical Machines,” “Electrical Machines and Drives,” “Control Micromotors,” “Motor Control,” “Relay Contact Control,” “Programmable Logic Controller Technology,” and “Factory Electrical Control” in higher education institutions and vocational colleges.

I. Experimental Projects

  1. DC Motor Experiments
    ① Introduction Experiment
    ② DC Generator
    ③ DC Shunt Motor
    ④ DC Series Motor
  2. Transformer Experiments
    ① Single-Phase Transformer
    ② Three-Phase Transformer
    ③ Connection Groups and Asymmetrical Short Circuits of Three-Phase Transformers
    ④ Three-Phase Three-Winding Transformer
    ⑤ Parallel Operation of Single-Phase Transformers
    ⑥ Parallel Operation of Three-Phase Transformers.
  3. Asynchronous Motor Experiments
    ① Operating characteristics of a three-phase squirrel-cage asynchronous motor
    ② Starting and speed regulation of a three-phase asynchronous motor
    ③ Single-phase capacitor-start asynchronous motor
    ④ Dual-speed asynchronous motor
  4. Relay contact control and electric drive (electrical control) experiments
    ① Jogging and self-locking control circuits for three-phase asynchronous motors
    ② Forward and reverse rotation control circuits for three-phase asynchronous motors
    ③ Y-Δ reduced voltage starting control circuits for three-phase asynchronous motors
    ④ Energy consumption braking control for three-phase asynchronous motors
    ⑤ Starting sequence control of two three-phase asynchronous motors
    ⑥ Starting control circuit for a three-phase wound asynchronous motor
    ⑦ Control circuit for a dual-speed asynchronous motor
    ⑧ Lathe electrical control circuit
  5. Motor performance experiments:
    1) No-load characteristic test of the motor;
    2) Load characteristic test of the motor;
    3) Speed ​​regulation characteristic test of the motor;
    4) Mechanical characteristics of a separately excited DC motor under various operating conditions;
    5) Mechanical characteristics of a three-phase asynchronous motor under various operating conditions;
    6) Plotting the M-S curve of a three-phase asynchronous motor.

II. Working Environment

  1. Input Power: Three-phase four-wire (or three-phase five-wire) ~380V±10% 50Hz
  2. Working Environment: Temperature -10℃～+40℃, Relative Humidity <85% (25℃), Altitude <4000m
  3. Device Capacity: <1.5KVA

III. Equipment Configuration

  1. Experimental Equipment Instruments and AC/DC Power Supplies
    ① AC Power Supply: Provides circuit breaker and overcurrent signal output, single-phase socket, and three-phase 0～450V adjustable AC power supply, and can also provide 0～250V adjustable power supply (equipped with a three-phase coaxial linkage autotransformer (specification 1.5KVA, 0～450V), overcoming many shortcomings of three single-phase voltage regulators using chain or gear structures). The adjustable AC power supply output is equipped with overcurrent protection technology, automatically protecting against phase-to-phase and line-to-line overcurrent and direct short circuits. It is equipped with three pointer-type AC voltmeters, which indicate the three-phase mains voltage and three-phase adjustable voltage via a switch. ① Equipped with a key switch and start/stop power control buttons.
    ② Two-way high-voltage DC power supply: Provides one set each of a 220V (0.5A) excitation power supply and a 0-250V (3A) continuously adjustable regulated armature power supply (with overvoltage, overcurrent, overheat, and short-circuit soft-cutoff automatic recovery protection functions), and includes a DC digital display voltmeter with switching display via a selector switch.
  2. Stainless steel motor guide rail, encoder, and tachometer: Includes the encoder disc and steel guide rail for fixing the motor. The steel guide rail has good flatness, no stress deformation, fine processing, good concentricity, and good interchangeability, ensuring concentricity between motor connections, low motor operating noise, typical experimental parameters, and can well meet experimental requirements.
  3. AC/DC Ammeters (Three Meters) These are general-purpose AC/DC ammeters, four-and-a-half-digit high-precision instruments with a 5-digit digital display, AC/DC measurement function switching, manual/automatic range switching, RS485 communication, relay output, upper limit alarm, and 4~20mA transmitter output. The instrument has a range switching function, allowing different ranges to be selected for different DC and AC circuit experiments.
    ① Power Supply: AC 220V;
    ② Signal Input Frequency: AC (40Hz~400Hz);
    ③ Signal Input Range: AC/DC 20mA, AC/DC 200mA, AC/DC 2000mA, AC/DC 5A;
    ④ Current Output Range: 4~20mA;
    ⑤ Communication Method: RS485;
  4. AC/DC Voltmeters (Three Meters) This is a general-purpose AC/DC voltmeter with a 4.5-digit high-precision display, AC/DC measurement function switching, manual/automatic range switching, RS485 communication, relay output, upper limit alarm, and 4~20mA transmitter output. The meter has a range switching function, allowing different range functions to be selected for different DC and AC circuit experiments.
    ① Power Supply: AC 220V;
    ② Signal Input Frequency: AC (40Hz~400Hz);
    ③ Signal Input Range: AC/DC 2V, AC/DC 20V, AC/DC 200V, AC/DC 500V;
    ④ Current Output Range: 4~20mA;
    ⑤ Communication Method: RS485;
  5. Intelligent Power Factor Meter (Three Units) The power and power factor meters are configured as 4.5-digit high-precision instruments, capable of measuring voltage, current, active power (positive and negative, representing absorbed and released power), and power factor from -1 to 0, 0-1. They feature a 5-digit digital display, RS485 communication, relay output, upper limit alarm, and 4~20mA transmitter output.
    ① Power Supply: AC 220V;
    ② Signal Input Frequency: AC (40Hz~400Hz);
    ③ Signal Input Range: Voltage: 0-450V, Current: 0-5A;
    ④ Current Output Range: 4~20mA;
    ⑤ Communication Method: RS485;
  6. DC Shunt Motor: 220V, 1.1A, 185W, 1600r/min
  7. Calibrated DC Generator: Not less than 1500RPM
  8. Three-phase Wound Asynchronous Motor: 220V/Y, 0.6A, 120W, 1380r/min
  9. Wound Asynchronous Motor Rotor Box: Wound asynchronous motor rotor resistors (0Ω, 2Ω, 5Ω, 15Ω, used for starting and speed regulation experiments of wound asynchronous motors)
  10. Three-phase Transformer: Composed of three identical single-phase transformers, primary side 220V/0.35A, secondary side… 55V/1.4A
  11. Three-phase core-type transformer: A three-phase, three-winding transformer with a three-column core structure. Each column has three windings: high voltage, medium voltage, and low voltage. Their rated values ​​are 127V/0.4A, 63.6V/0.8A, and 31.8V/1.6A respectively.
  12. Three-phase adjustable resistors (three sets of 90Ω×2/1.3A ceramic disc resistors)
  13. Three-phase adjustable resistors (three sets of 900Ω×2/0.41A ceramic disc resistors)
  14. Capacitor box: Provides 90Ω×2/1.3A ceramic disc resistors and 900Ω×2/0.41A capacitor boxes. 15. Ceramic disc resistor, one each of 1µF/450V, 2µF/450V, 35µF/450V, and 4µF/450V power capacitors, and one each of 10kΩ/8W and 20kΩ/8W power resistors.
  15. Three-phase adjustable reactor: Each phase consists of one 127V/0.5A fixed reactor and one 0-250V autotransformer, which can be used as a fixed inductor, adjustable reactor, or autotransformer.
  16. Waveform testing and switching board: Consists of a transformer waveform testing section, two three-pole double-throw switches, and one double-pole double-throw switch. 17. Relay Contact Control: Provides three AC contactors (coil voltage 220V), one thermal relay, one electronic time relay (power-on delay, operating voltage 220V), one set each of transformers (220V/26V/6.3V), rectifier circuit, and energy-consuming braking resistor (10Ω/25W), and three illuminated pushbuttons (one each of yellow, green, and red). The panel displays the outlines of the components and provides access to their terminals for experimental wiring. LEDs indicate the operating status of each component. The panel includes a rocker arm for viewing and adjusting any components that require adjustment.
  17. Experimental Leads: Uses highly reliable sheathed pistol-type connectors (eliminating the possibility of electric shock). The leads are made of oxygen-free copper wire drawn to a fine, hair-like thickness. The connectors are solid copper with beryllium-coated light copper springs.