A Circuit for Reliably Driving Coil Loads at Low Frequency
A driving coil, a reliable technology, applied in the direction of electrical components, adjusting electrical variables, output power conversion devices, etc., can solve the problems of power amplifier broadband waste, output current reduction, driving load capacity decline, etc., to reduce the impact, The effect of reducing heat generation and enhancing driving ability
Active Publication Date: 2022-05-03
南京拓途电子有限公司
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[0003] The disadvantage of this driving method is that the impedance of the inductive load will increase as the frequency increases, resulting in a decrease in the output current and a decrease in the ability to drive the load. Therefore, it is generally used in the case of low-frequency signals, which wastes the wide-band of the power amplifier.
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[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention.
[0021] see figure 1 , is a connection block diagram of a circuit for reliably driving a coil load at a low frequency according to ...
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The invention discloses a circuit for reliably driving coil loads at low frequencies, which is suitable for occasions where low-frequency signals are used to drive coil loads, and comprises a first switch circuit, a second switch circuit and an input control circuit. Both the first switch circuit and the second switch circuit include a rectification and filtering module, a transformer, a primary side switch drive module, and a signal feedback module. , signal feedback and other processed output, connected to both ends of the coil load; the input control circuit includes a transformer and a bias elimination module, the primary side of the transformer receives low-frequency signals, and the output of the secondary side is processed by the bias elimination module to the first switch circuit, The switching devices in the second switching circuit output switching signals. The circuit topology of the present invention is simple, easy to implement, reduces cost, enhances drive capability, and reduces the influence of DC bias on coil loads.
Description
technical field [0001] The invention relates to the field of electronic circuits, in particular to a circuit for reliably driving coil loads at low frequencies. Background technique [0002] In the fields of medical treatment, mine detection, and signal transmission, it is usually necessary to drive inductive loads and use the basic theory of electromagnetic fields to transmit energy. The existing driving method usually uses a switching power supply to rectify and filter the AC mains, convert AC to DC, and then supply power to a power amplifier, thereby amplifying the signal to drive the inductive load. [0003] The disadvantage of this driving method is that the impedance of the inductive load will increase as the frequency increases, resulting in a decrease in the output current and a decrease in the ability to drive the load. Therefore, it is generally used in the case of low-frequency signals, which wastes the wide-band of the power amplifier. . [0004] Therefore, it ...
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IPC IPC(8): H02M3/335H02M5/458H02M1/092
CPCH02M3/33576H02M5/458H02M1/092H02M1/0077
Inventor 张成张晨
Owner 南京拓途电子有限公司