Frequency conversion air conditioning inverter IPM protection

Y series best cast iron three phase induction motor

Specifications
1. 20 years manufacturing experience 
2. 12 months guarantee 
3. low noise and temperature rise 
4. high starting torque 

5. AC Voltage: 220V/380V, 380V/660V,400V/690V,220V/400V

 IPM module itself has the dc flow and the overheating protection signal output, its principle as shown in figure 13. IPM module is internal protection circuit AC synchronous generator and internal constitute a loop under the arm, power supply using lower arm E trigger drive power. Protection signal transmission to the CPU, so should pass light lotus root IC9 isolation and Q1, driven by the www.dongfeng-motor.com plug CN1 terminals (1) the output to the motherboard. Protection process analysis is as follows: under the normal state, IPM triode internal protection for by the state, the light lotus root IC9 in globe, transistor Q1 in micro conduction fan motor state, the output voltage is + 4.3 V. Due to the PN voltage is too high, compressor stalling or other reasons, such as the IPM output current is too large, and the heat dissipation, continuous and overheat lamination the IPM, such as work time is too long, IPM internal protection triode by globe into conduction, light lotus root IC9 in conduction, transistor Q1 base for low voltage, Q1 closing, the emitter output low voltage protection signals.