MR475E Capacitor Start Motor Electrical Machine Trainer Teaching Equipment
1. Equipment introduction
1.1 Overview
Capacitor start motors use two capacitors: a starting capacitor and a run capacitor. The starting capacitor is mainly used to increase the starting torque of the motor, that is, the starting coil of the motor is energized when starting and cut off after starting; while the running capacitor allows the motor to play the role of capacitance compensation during operation, and it always accompanies the motor to run. The main function is to balance the electromagnetic relationship between the main winding and the secondary winding of the motor to maximize the power of the motor and reduce noise and vibration.
1.2 Features
1. The main function of the starting capacitor is to provide a larger current when the motor starts to help the motor start quickly. When the motor reaches about 75% of the rated speed, the starting capacitor is disconnected from the starting winding of the motor by a disconnection device. This starting device is generally called a "centrifugal switch", and it can also be manually disengaged.
2. The running capacitor also helps to start the motor at the beginning, but it always accompanies the motor to ensure the stable operation of the motor.
3. Single-phase dual-value capacitor asynchronous motor is also called "capacitor start and run type". This kind of motor has two windings, namely the starting winding and the running winding. The two windings are 90 degrees apart in space. A capacitor with a large capacity is connected in series to the starting winding. When the running winding and the starting winding pass through single-phase alternating current, the current in the starting winding is 90 degrees ahead of the current in the running winding due to the action of the capacitor. reaches the maximum value, thus forming a rotating magnetic field.
4. It has the advantages of simplicity and reliability. The circuit structure is relatively simple and only requires a capacitor and a contactor to achieve it. At the same time, capacitors and contactors have high reliability, low failure rate, and low maintenance and repair costs.
5. Efficient and stable: Motor capacitor starting can provide instantaneous starting current, allowing the motor to start quickly. At the same time, the presence of the capacitor makes the current waveform of the motor more stable, improving the operating efficiency and stability of the motor.
2. Technical parameters
Input power: 220V 50Hz 0.75kW
Weight:17Kg
Working conditions: -10℃～+40℃
Size: 400mm*300mm*410mm
3. Components list and detailed introduction
3.1 Main part
No. Name
1 Dual capacitor
2 Capacitor start motor
3 AC voltmeter
4 British plug
5 Circuit breaker with leakage protection 2P 16A
6 AC ammeter
3.2 Equipment configuration list
No. Name Qty
Component 1 Dual capacitor 1
Component 2 Capacitor start motor 1
Component 3 British plug 1
Component 4 AC voltmeter 1
Component 5 Circuit breaker with leakage protection 2P 16A 1
Component 6 AC ammeter 1
4. Experiment list
Experiment 1 Understanding the principle of capacitor-start motor
Experiment 2 Capacitor Start Motor Operation Experiment
