Wireless power supply system for motor rotor

A technology of wireless power supply and motor rotor, applied in control system, AC motor control, circuit, etc., can solve problems such as easy generation of sparks and dust, affecting the safety and reliability of motors, and limiting the application environment of motors

Active Publication Date: 2020-10-23
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 a

Method used

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  • Wireless power supply system for motor rotor
  • Wireless power supply system for motor rotor
  • 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] like 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] like 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 state, ...

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] like 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), the...

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PUM

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Abstract

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

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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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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