Home >
Control Circuits >Motor Control > Negative sequence current phase failure protection circuit 2
Negative sequence current phase failure protection circuit 2
Source: InternetPublisher:公子李 Keywords: Protection circuit phase failure protection BSP Updated: 2020/02/09
In the figure, capacitor
Cl, resistors Ri and R2 form a negative sequence current filter
; transistors VT1 and VTz form a Schmitt circuit
to improve the reliability of the circuit.
When one phase of the power supply is missing, the negative sequence current filter
has a current signal output, the transistor VTi is turned on,
VT2 is cut off, and VTa is turned on, the relay KA is closed, the contactor KM is released, and the motor stops.
Latest Control Circuits Circuits
- Manual automatic air compressor control circuit
- Add one more component to improve the phase failure protection function
- Temperature control circuit design and analysis
- Guanghua brand anti-theft doorbell electronic lock circuit
- A novel and practical power line anti-theft and cutting alarm circuit
- High-sensitivity and high-loudness burglar alarm circuit
- Range hood automatic controller
- Refrigerator Thermostat Replacement Device
- Delayed electronic fuse
- Add a breeze block to your remote control wall fan
Popular Circuits
- strain sensor
- Inpatient pager circuit
- Farmland drainage automatic control circuit
- Farmland irrigation automatic control circuit b
- Diode Balanced Mixer Circuit
- collector amplitude modulation circuit
- Series crystal oscillator
- Common emitter-common base wideband amplifier circuit composed of F733 integrated amplifier
- OTL low frequency power amplifier circuit
- Various signal generator circuits
京公网安备 11010802033920号