Autotransformer serial voltage regulation circuit
A technology of autotransformer and voltage regulating circuit, which is applied in the direction of conversion equipment that can be converted to DC without intermediate conversion, can solve the problems of voltage instability, low reliability, slow response speed, etc., and achieve no harmonic output, Simple control and high reliability effect
Inactive Publication Date: 2012-05-09
DAYU ELECTRIC
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Problems solved by technology
Using a transformer to adjust the input voltage of electrical equipment can only be converted from one voltage to another. The output voltage of the transformer is greatly affected by the input grid voltage and load, the voltage is unstable, and stepless continuous adjustment cannot be realized. Not suitable for occasions that require continuous adjustment of the input voltage
Using a voltage regulator to adjust the input voltage of electrical equipment is a mechanical adjustment, which cannot be directly controlled by electricity. It is inconvenient to use, the response speed of mechanical adjustment is slow, and the dynamic performance is poor.
Power electronic converters can achieve high-performance voltage regulation, but they are costly, complicated to control, and low in reliability.
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[0013] Below, the present invention will be further described in conjunction with the accompanying drawings.
[0014] like figure 1 As shown, the head end of the autotransformer (T) is connected to the input power supply, the end of the autotransformer (T) is connected to the electrical equipment, and a transistor assembly ( P), the sampling circuit (F) detects the input voltage and current of the electrical equipment, the controller (K) outputs the control signal after calculation, and the switching frequency and duty cycle of the transistor component (P) are controlled by triggering the drive system (C) , to transform the input grid voltage into the voltage required by the electrical equipment.
[0015] The above are only preferred embodiments of the present invention, and are not intended to limit the invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present inventio...
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The invention relates to an autotransfomer serial voltage regulation circuit comprising an autotransfomer, a transistor assembly, a sampling circuit, a controller and a trigger driving system. It is characterized in that the transistor assembly is parallel connected between a head end and a centre tap of the autotransfomer; the head end of the autotransfomer is connected with an input power source and a tail end of the autotransfomer is connected with a piece of electric equipment; and conduction of the transistor assembly is controlled to adjust input voltage of the electric equipment. The invention is a technical proposal for combined voltage regulation by a power electronic device and the autotransfomer, thereby avoiding defects of the conventional transformer and voltage regulator such as poor voltage regulation performance and difficult control, reaching voltage regulation performance of the power electronic way, but being simpler, lower in cost and more reliable than the power electronic way.
Description
technical field [0001] The invention belongs to the technical field of control circuits, and in particular relates to a main circuit of an AC voltage regulating circuit, which is a circuit especially suitable for voltage regulation and regulation of input power of high-voltage electrical equipment. Background technique [0002] At present, there are transformers, voltage regulators, and power electronic converters for AC voltage regulation. Using a transformer to adjust the input voltage of electrical equipment can only be converted from one voltage to another. The output voltage of the transformer is greatly affected by the input grid voltage and load. The voltage is unstable and cannot achieve stepless continuous adjustment. Not suitable for occasions that require continuous adjustment of the input voltage. Using a voltage regulator to adjust the input voltage of electrical equipment is a mechanical adjustment, which cannot be directly controlled by electricity. It is inc...
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IPC IPC(8): H02M5/12
Inventor 程世国宁国云
Owner DAYU ELECTRIC