发明名称 |
A control circuit for vibrating compressors |
摘要 |
<p>A control circuit for vibrating compressors for converting d-c voltage into a-c voltage to supply a-c voltage to a vibrating compressor 1 comprising a MOS-FET transistor 2 for driving the vibrating compressor 1, a timer IC for generating pulses to switch the MOS-FET transistor 2, a timer forced-operation circuit for forcibly reversing the output of the timer IC at a timing at which a counter-electromotive voltage generated by the vibrating compressor 1 during the OFF period of the MOS-FET transistor 2 is restored in the vicinity of 0 volts, a driver for driving the MOS-FET transistor 2 based on the output of the timer IC, and a pulse width changing circuit 9 for detecting an input voltage input into the vibrating compressor 1 and lowering the input voltage to the vibrating compressor 1 by changing the pulse width of output pulses of the timer IC when the input voltage is higher than a predetermined voltage. <IMAGE> <IMAGE></p> |
申请公布号 |
EP0895342(A2) |
申请公布日期 |
1999.02.03 |
申请号 |
EP19980114281 |
申请日期 |
1998.07.30 |
申请人 |
SAWAFUJI ELECTRIC CO., LTD. |
发明人 |
NAMAI, MASAO;AKAZAWA, NAOKI |
分类号 |
H02M7/537;H02P25/10;H02P27/06;(IPC1-7):H02M7/537 |
主分类号 |
H02M7/537 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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