초록 ▼

A controlling device of a compressor is provided. A noise filter is arranged at an input of the inverter circuit that converts the commercial frequency to a driving frequency to control a motor driving a compressor mechanism, for suppressing a common mode noise of the commercial power source and the

A controlling device of a compressor is provided. A noise filter is arranged at an input of the inverter circuit that converts the commercial frequency to a driving frequency to control a motor driving a compressor mechanism, for suppressing a common mode noise of the commercial power source and the inverter circuit, and is connected to a ground through a metal frame used for receiving a compressor main body. The noise filter comprises coils connected between first capacitors and second capacitors that are connected in series between the AC power lines, and further comprises a clamper connected between nodes of the second capacitors and the metal frame for clamping a voltage and a third capacitor connected to the clamper in parallel. even though the new refrigerant, such as R410A, and the three-phase AC power source are used, the leakage current can be reduced by a simple structure and the increase of the noise terminal voltage can be also suppressed. Furthermore, both of the legal regulation requirements can be met.

대표청구항 ▼

1. A controlling device of a compressor, comprising:a commercial power source;a motor, for driving a compressor mechanism;an inverter circuit, for converting a commercial frequency to a driving frequency, to control the motor;a noise filter, arranged at an input of the inverter circuit, for suppress

1. A controlling device of a compressor, comprising:a commercial power source;a motor, for driving a compressor mechanism;an inverter circuit, for converting a commercial frequency to a driving frequency, to control the motor;a noise filter, arranged at an input of the inverter circuit, for suppressing a common mode noise of the commercial power source and the inverter circuit, and connected to a ground through a metal frame used for receiving a compressor main body, wherein the noise filter further comprises first capacitors, second capacitors and common mode reactor coils; anda leakage current suppressing circuit, having a clamper for clamping a voltage, and connected between nodes of the second capacitors and the metal frame,wherein in the noise filter, one end of each second capacitor is connected to an AC power line through a corresponding common mode reactor coil, and the other end of the each second capacitor is connected to the leakage current suppressing circuit, and each of the first capacitors is connected between two of the AC power lines. 2. The controlling device of claim 1, wherein the clamper in the leakage current suppressing circuit is formed by opposite connected Zener diodes. 3. The controlling device of claim 2, wherein a Zener voltage of the Zener diode is set within a range from 10V to 30V. 4. A controlling device of a compressor, comprising:a commercial power source;a motor, for driving a compressor mechanism;an inverter circuit, for converting a commercial frequency to a driving frequency, to control the motor;a noise filter, arranged at an input of the inverter circuit, for suppressing a common mode noise of the commercial power source and the inverter circuit, and connected to a ground through a metal frame used for receiving a compressor main body, wherein the noise filter further comprises first capacitors, second capacitors and common mode reactor coils; anda leakage current suppressing circuit, having a clamper for clamping a voltage, connected between nodes of the second capacitors and the metal frame; and a third capacitor, connected to the clamper in parallel,wherein in the noise filter, one end of each second capacitor is connected to an AC power line through a corresponding common mode reactor coil, and the other end of the each second capacitor is connected to the leakage current suppressing circuit, and each of the first capacitors is connected between two of the AC power lines. 5. The controlling device of claim 4, wherein the clamper in the leakage current suppressing circuit is formed by opposite connected Zener diodes. 6. The controlling device of claim 5, wherein a Zener voltage of the Zener diode is set within a range from 10V to 30V. 7. The controlling device of claim 4, wherein the capacitance of the third capacitor is set within a range from 470 pF to 10000 pF.