Charging control circuit for variable pitch system of wind power generation

Abstract

The invention discloses a charging control circuit for a variable pitch system of wind power generation, which comprises a control circuit for charging current and a control circuit for charging voltage and temperature compensating; the control circuit for charging current and the control circuit for charging voltage and temperature compensating are connected to the primary side of an optical coupler, a control chip is connected to the secondary side of the optical coupler, and the control chip is connected to a double transistor forward circuit and controls the output of the double transistor forward circuit. The invention has the advantage of elaborate design, reasonable structure, and simple circuit structure, the work of three control signals including charging voltage, charging current and temperature compensation of a charger of the variable pitch system can be realized by the control circuit, charging voltage and charging current are controlled separately, and the problems such as severe control coupling and complex control of charging voltage and temperature compensating for the traditional charger can be solved.

Description

technical field [0001] The invention relates to a charging control circuit, in particular to a charging control circuit of a wind power generation pitch system. Background technique [0002] Many wind power pitch chargers use the flyback circuit topology as the functional circuit. As the power of the charger increases, more and more chargers use the dual-transistor forward circuit topology for the main circuit. [0003] If this dual-tube forward circuit is controlled by a pure analog circuit, the control circuit will be complicated, and the output cannot be flexibly controlled; at the same time, the wind power variable pitch charger needs to have output voltage, output current controllable, and temperature compensation function. The compensation coefficient is affected by the output voltage, and the two are coupled with each other in practical applications, resulting in more complicated control. [0004] At present, in domestic wind power variable pitch applications, there ...

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Problems solved by technology

[0003] If this dual-tube forward circuit is controlled by a pure analog circuit, the control circuit will be complicated, and the output cannot be flexibly controlled; at the same time, the wind power variable pitch charger needs to have output voltage, output current controllable, and temperature compensation function. The compensation coefficient is affected by the output voltage, and the two are coupled to each other in practical applications, resulting in more complicated control

[0004] At present, in domestic wind power variable pitch applications, there is no circuit that can concisely and flexibly integrate the above three output control functions. It is convenient and flexible to modify parameters

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