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Composite power inverter with linear output and PWM output

A power converter and linear output technology, applied in the field of hybrid power converters, can solve the problem of combining power converters with PWM output power converters, etc., and achieve good dynamic response characteristics, high control accuracy, high resolution high rate effect

Active Publication Date: 2009-11-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the current power converter cannot effectively combine the power converter with linear output and the power converter with PWM output, so that it can meet the needs of different occasions. Hybrid Power Converter with PWM Output

Method used

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  • Composite power inverter with linear output and PWM output
  • Composite power inverter with linear output and PWM output
  • Composite power inverter with linear output and PWM output

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specific Embodiment approach 1

[0027] Specific implementation mode one: the following combination figure 1 , figure 2 To illustrate this embodiment, the hybrid power converter with linear output and PWM output described in this embodiment is a single-phase power converter 6, and the single-phase power converter 6 includes a linear amplifier, a first controllable switch 1, a second controllable control switch 2, the first diode D1 and the second diode D2,

[0028]The linear amplifier includes a third controllable switch 3, a fourth controllable switch 4 and an operational amplifier 5, the positive terminal of the third controllable switch 3 is the positive terminal of the linear amplifier, the negative terminal of the third controllable switch 3 is connected to the fourth controllable switch The positive terminal of the control switch 4 is connected, the negative terminal of the fourth controllable switch 4 is the negative terminal of the linear amplifier, the control terminal of the third controllable sw...

specific Embodiment approach 2

[0043] Specific implementation mode two: the following combination image 3 Describe this embodiment, the hybrid power converter with linear output and PWM output described in this embodiment is a single-phase power converter with dual power supply structure, which includes two single-phase power converters 6, two single-phase power converters The positive terminals of the high-voltage DC power supply of the two single-phase power converters 6 are connected together, the positive terminals of the low-voltage DC power supplies of the two single-phase power converters 6 are connected together, and the negative terminals of the low-voltage DC power supplies of the two single-phase power converters 6 are connected together. connected together, the negative poles of the high-voltage DC power supply of the two single-phase power converters 6 are connected together, and the output terminals of the two single-phase power converters 6 serve as two terminals of a hybrid power converter w...

specific Embodiment approach 3

[0051] Specific implementation mode three: the following combination Figure 4 , Figure 5 Describe this embodiment, the hybrid power converter with linear output and PWM output described in this embodiment is a multi-phase power converter, including n single-phase power converters 6, n single-phase power converters 6 are arranged in series, n is a natural number, and n≥3,

[0052] The single-phase power converter 6 includes a linear amplifier, a first controllable switch 1, a second controllable switch 2, a first diode D1 and a second diode D2,

[0053] The linear amplifier includes a third controllable switch 3, a fourth controllable switch 4 and an operational amplifier 5, the positive terminal of the third controllable switch 3 is the positive terminal of the linear amplifier, the negative terminal of the third controllable switch 3 is connected to the fourth controllable switch The positive terminal of the control switch 4 is connected, the negative terminal of the four...

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Abstract

The invention discloses a composite power inverter with linear output and PWM output, belonging to the field of electric machine control. The invention aims to solve the problem that a power inverter can not effectively combine a power inverter with linear output and a power inverter with PWM output. The invention provides a first single-phase power inverter, two ends of the four serial controllable switches are respectively connected with the positive pole and the negative pole of a high-voltage power supply, and the control ends of two middle controllable switches are simultaneously connected with the output end of an operational amplifier; one end of each of two diodes is respectively connected with the positive pole and the negative pole of a low-voltage power supply, the other end thereof is connected with the positive pole and the negative pole of a linear amplifier, and n first single-phase power inverters are connected in series to form a polyphase power inverter. A second single-phase power inverter is composed of two first single-phase power inverters, four input ends of the two first single-phase power inverters are connected correspondingly, and two output ends are respectively connected with one end of a load; n second single-phase power inverters are connected in series to form the polyphase power inverter.

Description

technical field [0001] The invention relates to a hybrid power converter with linear output and PWM output, which belongs to the field of motor control. Background technique [0002] In the servo drive system, in order to improve the response characteristics and efficiency of the system, PWM power conversion circuits (amplifiers) are usually used; and in the occasions that require extremely high positioning accuracy and smooth operation, due to the current ripple caused by PWM chopping and In order to prevent the instability caused by the dead time set by the short circuit of the bridge arm, sometimes the required performance cannot be obtained. At this time, the system efficiency has to be sacrificed and a linear amplifier with large loss is used. In addition, in audio amplifiers, linear amplifiers are generally used from the perspective of simplifying the control circuit and emphasizing sound quality, but in large-scale sound amplification devices, PWM-type amplifiers (cla...

Claims

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Application Information

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IPC IPC(8): H02P27/08
Inventor 寇宝泉刘日忠刘奉海
Owner HARBIN INST OF TECH
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