| 摘要 |
<p>A heat pump application device (500) comprises a compressor (501) for compressing a cooling medium, a motor (505) for operating the compressor (501), a radiator (502) for cooling the cooling medium compressed by the compressor (501), an expander (503) for expanding the cooling medium passing through the radiator (502), an evaporator (504) for evaporating the cooling medium expanded by the expander (503), a generator (507) connected to the expander (503) to generate power with the expansion energy of the cooling medium, and a variable speed converter (508) for converting the AC power generated by the generator (507) into DC power to regenerate power supplied to the motor (505). The variable speed converter (508) conduct a control to reduce the voltage on the PC power line (DL<SUB>1</SUB>, DL<SUB>2</SUB>) for regenerated power below a threshold.</p> |
