Pitch control unit of wind driven generator and device thereof

• Main Authors: LI XIAOWEI, LIU HANGZHONG, DAI JING, DOU KANGMING, WANG KE, MIAO TIAN
• Format: Patent
• Language: Chinese; English
• Published: 27.04.2011
• Subjects: BLASTING; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; HEATING; LIGHTING; MACHINES OR ENGINES FOR LIQUIDS; MECHANICAL ENGINEERING; OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR; PRODUCING MECHANICAL POWER; SYSTEMS FOR STORING ELECTRIC ENERGY; WEAPONS; WIND MOTORS; WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS

The utility model provides a pitch control unit of a wind driven generator with an alternating current asynchronous motor and a device thereof. The pitch control unit comprises a three-phase alternating-current power source, a servo controller, a stand-by direct current power source and an alternating-current asynchronous motor. An output end of the three-phase alternating-current power source is connected with an input end of the servo controller, the servo controller comprises a servo power source, a servo driver and a control switch subunit, an output end of the servo power source is connected with an input end of the servo driver, an output end of the servo driver is connected with the alternating-current asynchronous motor, a positive electrode of the stand-by direct current power source is connected with an anode of a switching diode, a negative electrode of the stand-by direct current power source is connected to the input end of the servo driver, a cathode of the switching diode is connected with the