A wireless power supply system for motor rotor

A wireless power supply and motor rotor technology, applied in control systems, AC motor control, circuits, etc., can solve problems such as affecting the safety and reliability of the motor, limiting the application environment of the motor, easily generating sparks and dust, etc. The effect of improving energy utilization and meeting work demands

Active Publication Date: 2021-11-16
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Motor equipment is widely used in daily production and life. However, the slip rings and brushes of the motor are prone to sparks and dust during operation, which seriously affects the safety and reliability of the motor operation. At the same time, it is very difficult to maintain the motor in some special environments. Slip rings and brushes limit the application environment of the motor

Method used

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  • A wireless power supply system for motor rotor
  • A wireless power supply system for motor rotor
  • A wireless power supply system for motor rotor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1 The compensation network is a parallel compensation structure

[0055] The primary-side compensation network and the three secondary-side compensation networks each include a compensation capacitor and a compensation inductor.

[0056] Such as figure 2 As shown, in the primary side compensation network, the compensation capacitor L11 is connected in parallel at both ends of the resolver primary side winding, and the compensation inductor L11 is connected in series with the resolver primary side winding at the midpoint of the two bridge arms of the unidirectional full bridge.

[0057] In the three secondary side compensation networks, each compensation capacitor (C21, C22 or C23) is connected in parallel across the resolver secondary side winding, and the compensation inductor (L21, L22 or L23) is connected in series with the resolver secondary side winding Afterwards, it is connected with the AC-AC frequency conversion circuit of the corresponding phase. ...

Embodiment 2

[0059] Embodiment 2 The compensation network is a series compensation network

[0060] The primary-side compensation network and the three secondary-side compensation networks each include a compensation capacitor and a compensation inductor connected in series with the compensation capacitor.

[0061] Such as image 3 As shown in (a), in the primary-side compensation network, the compensation inductor L11, the resolver primary-side winding and the compensation capacitor C11 are serially connected in series and connected to the unidirectional full bridge.

[0062] In the three secondary side compensation networks, the compensation inductor (L21, L22 or L23), the resolver secondary side winding and the compensation capacitor (C21, C22 or C23) are serially connected in series and connected to the AC / AC frequency conversion circuit of the corresponding phase.

[0063] When the working frequency is equal to the resonant frequency, the resonant network is in the full resonant stat...

Embodiment 3

[0064] Embodiment 3 The compensation network is an LCC compensation structure

[0065] Each of the primary side compensation network and the three secondary side compensation networks includes a compensation inductor and two compensation capacitors. The two compensation capacitors are respectively the first compensation capacitor and the second compensation capacitor.

[0066] Such as image 3 As shown in (b), in the primary side compensation network, the first compensation capacitor C11 is connected in parallel at both ends of the resolver primary winding, and the compensation inductance L11, the resolver primary winding and the second compensation capacitor C12 are connected in series with the unidirectional full bridge connected.

[0067] In the three secondary side compensation networks, each first compensation capacitor (C21, C23 or C25) is connected in parallel at both ends of the secondary side winding of the resolver, and the compensation inductor (L21, L22 or L23), ...

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PUM

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Abstract

The invention discloses a wireless power supply system for a motor rotor, which includes a main circuit system and a control system; the main circuit system includes a three-phase full-bridge circuit, a single-phase full-bridge circuit, a magnetic coupling resonant network, an alternating and alternating frequency conversion circuit and a winding motor rotor. The magnetic coupling resonant network includes a primary side compensation network, a rotary transformer and three secondary side compensation networks; among them, the primary side compensation network is connected with the fixed winding in the rotary transformer to form a single-phase input; the three secondary side compensation networks are respectively It is connected with the rotating winding in the resolver to form a three-phase output; the control system includes controller 1, controller 2 and wireless information transmission module; controller 1 can control the three-phase full-bridge circuit and single-phase full-bridge circuit ; The controller 2 can control the three-phase AC-AC frequency conversion circuit. The invention can completely replace the motor rotor wireless power supply system of the slip ring device, and can realize the frequency conversion control of the rotor electric energy and the bidirectional flow of energy.

Description

technical field [0001] The invention relates to the fields of motor control, power electronic transformer and wireless power transmission, in particular to a motor rotor wireless power supply system. Background technique [0002] With the rapid development of power electronic technologies such as power silicon carbide in recent decades, high-frequency power electronic transformers have received extensive attention in the past ten years. At the same time, the rapid development of wireless power transmission, non-contact power transmission has received a lot of research, and the efficiency is getting higher and higher. [0003] Motor equipment is widely used in daily production and life. However, the slip rings and brushes of the motor are prone to sparks and dust during operation, which seriously affects the safety and reliability of the motor operation. At the same time, it is very difficult to maintain the motor in some special environments. Slip rings and brushes limit th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J50/12H02P27/16H02M5/293H01F38/18
CPCH01F38/18H02M5/293H02P27/16H02J50/12
Inventor 金平常岭卢意夏志鹏田煜窦卓慧
Owner HOHAI UNIV
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