Frequency conversion motor test system
Frequency conversion motor test system
Measurement part: including the vector voltmeter and ammeter of the variable frequency motor, as well as the corresponding signal acquisition module.
Control system: including inverter, plc, touch screen, host computer and other control units.
Data processing and display system: including data acquisition card, which is used to upload the parameters such as voltage or frequency measured on site to the computer for processing and display through the rs232 serial port.
Test platform and environmental conditions requirements:
1. The size of the test platform is 1m×1.5m×2m;
2. Ambient temperature: 5°C~40°C; relative humidity ≤80%;
3. Power supply voltage ac220v±10%, 50hz;
4. Working power:
220v ac, 50hz.
5. Maximum allowable value of current output:
1a, the maximum allowable value of voltage output is 10kv.
6. The input terminal of the inverter should be connected to the ground wire.
7. During the test, the inverter should be in a no-load state, that is, without any external load;
8. When the power capacity of the inverter is greater than 5 kw, a fuse should be connected between the inverter and the motor to prevent short-circuit accidents.
9. When the following conditions occur during the test, the power switch must be cut off immediately to protect the safe operation of the equipment:
(1) The pointer of the voltmeter swings more than 10% of the rated value;
(2) The pointer of the ammeter swings more than 10% of the rated value;
(3) When the over-current protection function of the inverter is activated and the main circuit power supply is cut off, the torque output cannot be stopped;
(4) One of the situations in which a ground fault occurs and the insulation of the motor is damaged, causing personal injury or property damage.
(5) The DC bus is charged due to the short-circuit fault of the DC bus to ground caused by external reasons.
(6) In case of other abnormal conditions, the main knife switch should be cut off immediately to ensure safety.
10. In order to ensure the personal safety of the test personnel and the safe use of the equipment, the system adopts a two-level leakage protection design.