发明名称 |
High voltage power supply for an X-ray tube |
摘要 |
A supply for a high bias voltage in an X-ray imaging system has an inverter and a voltage multiplier that produce an alternating output voltage in response to control signals. A voltage sensor produces a signal indicating a magnitude of the output voltage. A circuit determines a difference between the sensor signal and a reference signal that specifies a desired magnitude for the output voltage and that difference is integrated to produce an error signal. The error signal preferably is summed with a precondition signal that is an approximation of a nominal value for the signal sum and the summation producing a resultant signal. Another summation device arithmetically combines the resultant signal and the sensor signal with a signal corresponding to a one-hundred percent duty cycle of the inverter operation in order to produce a duty cycle command. An inverter driver generates the inverter control signals that have frequencies defined by the resultant signal and have duty cycles defined by the duty cycle command. A unique state machine is described which generates those control signals.
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申请公布号 |
US5400385(A) |
申请公布日期 |
1995.03.21 |
申请号 |
US19930116143 |
申请日期 |
1993.09.02 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
BLAKE, JAMES A.;SCHMIDT, JONATHAN R.;WU, MICHAEL A. |
分类号 |
H05G1/20;H05G1/32;(IPC1-7):H05G1/34 |
主分类号 |
H05G1/20 |
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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