Fully digital electric variable pitch driver
A pitch drive, all-digital technology, applied in the field of pitch pitch systems, can solve problems such as low precision and long scanning period, and achieve the effect of ensuring control accuracy, reliable performance and flexible control methods
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[0017] In the following, the present invention will be further described in conjunction with the embodiments.
[0018] Reference Figure 1 to Figure 3 A fully digital electric pitch drive. Its peripheral equipment includes a shaft cabinet, a pitch execution motor, and an incremental encoder on the output shaft of the motor. The drive circuit includes two parts: a drive circuit and a control circuit; The drive circuit includes a rectifier circuit, an inverter circuit, a switching power supply circuit, as well as a current and voltage detection circuit, and a relay drive circuit; the control circuit includes a DSP module, a CPLD module, a PWM signal drive circuit, a signal conditioning circuit, and switching value acquisition Circuit, encoder signal conditioning and acquisition circuit, communication circuit; among them:
[0019] The signal flow of controlling the pitch execution motor is: the electric pitch drive directly communicates with the wind turbine master control, and the w...
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