发明名称 |
Control equipment for resistance welding machine |
摘要 |
A control equipment for a resistance welding machine for welding a material by the Joule heat generated in the material by applying an electric power to the material, including an inverter for converting a DC voltage to an AC voltage by pulse width modulation control, a transformer having a primary winding to which the AC voltage is applied and having a secondary winding which supplies an AC current to the material, and a control unit for generating an AC current reference with a rectangular waveform of a specified frequency, comparing the AC current reference with an output current of the inverter to obtain an error, and for PWM controlling the inverter so that the error becomes zero.
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申请公布号 |
US5844193(A) |
申请公布日期 |
1998.12.01 |
申请号 |
US19950452338 |
申请日期 |
1995.05.26 |
申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
NOMURA, YOSHIHITO;AMBO, TATSUAKI;SOUMA, SABURO;OKADO, CHIHIRO |
分类号 |
B23K11/24;B23K11/25;H02M7/5387;(IPC1-7):B23K11/24 |
主分类号 |
B23K11/24 |
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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