Abstract: Aiming at the problem that the frequency conversion refrigerator is qualified according to the national standard test, but the harmonic current test result may not be qualified according to the latest IEC electromagnetic compatibility standard test, puts forward a method of installing power factor correction circuit to the frequency conversion refrigerator to suppress the harmonic. Analyzes the difference between the national standard and the latest IEC electromagnetic compatibility standard on frequency conversion refrigerator harmonic current test, and verifies the feasibility of the scheme through the test data of frequency conversion refrigerator harmonic test. The experimental results show that the power factor correction circuit can reduce the harmonic current value, improve the power factor and suppress the harmonic effectively.

Key words: Frequency conversion refrigerator, Electromagnetic compatibility, Power factor correction circuit, Harmonic suppression