Constant active power control circuit of single phase alternating current fan and water pump

• Main Author: SU BO
• Format: Patent
• Language: Chinese; English
• Published: 02.01.2013
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

Disclosed is a constant active power control circuit of a single phase alternating current fan and a water pump. The constant active power control circuit is applied to fields of products of gas wall-hanging stoves, gas water heaters, gas air heaters, biomass furnaces, solar energy hot water work stations, room air renewal systems (new air systems) and the like. The constant active power control circuit comprises a floating ground direct-current power supply, an alternating voltage zero-cross detection portion, an alternating voltage sampling and amplifying circuit, a motor current sampling and amplifying circuit, a motor driving circuit, a micro controller unit (MCU) and a serial communication separation circuit. The micro controller obtains a current target work power value of a fan or a water pump through serial communications and performs proportion integration differentiation (PID) algorithm control according to a current actual work power value of a motor to achieve the constant active power control of