Capacitor and permanent magnetic direct-current motor

A capacitor and capacitor ceramic technology, applied in the direction of fixed capacitor dielectric, fixed capacitor terminal, fixed capacitor components, etc., can solve the problems of complex installation and welding process, large capacitor footprint, etc., to achieve small size, prolong life, The effect of suppressing sparks

Inactive Publication Date: 2016-01-20
GUANGZHOU MAGNET ELECTRICITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of existing DC motors in removing sparks and passing EMC tests, the capacitors occupy a large area or the installation and welding process is complicated. Capacitors tested
[000

Method used

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  • Capacitor and permanent magnetic direct-current motor
  • Capacitor and permanent magnetic direct-current motor
  • Capacitor and permanent magnetic direct-current motor

Examples

Experimental program
Comparison scheme
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Example

[0041] refer to image 3 , the third specific embodiment of the capacitor of the present invention, the capacitor is a regular pentagon, the capacitor ceramic substrate 1 is connected with five end electrodes 2, the cross section of the capacitor substrate 1 is a rectangle, and the end electrodes 2 are distributed on one end surface.

[0042] refer to Figure 4 , the fourth specific embodiment of the capacitor of the present invention, the capacitor is annular, including a capacitor ceramic substrate 1, three positive end electrodes 2, an outer side electrode 3 and an inner side electrode 3', each electrode in the end surface electrode, the inner and outer side electrodes The electrodes are connected to each other, and the section of the capacitor substrate 1 is rectangular.

[0043] refer to Figure 5 and Image 6 , the fifth specific embodiment of the capacitor of the present invention, the capacitor is annular, including a capacitor ceramic substrate 1, three positive end ...

Example

[0045] refer to Figure 7 , the first specific embodiment of a permanent magnet DC motor of the present invention, a ring capacitor I is mounted on the rotor of the motor, and the rotor of the motor includes a rotating shaft 4, three sets of coils 8, three iron cores 9, adjusting gaskets 5, copper rings 6, Insulation sleeve 7 , commutator 11 and oil stop gasket 12 . The annular capacitor I is inserted into the rotating shaft 4 and then sleeved into the commutator 11 . The installation method of the annular capacitor I on the rotor is as follows: the installation direction of the annular capacitor I is that the end face electrodes face the coil 8 and the iron core 9, and the two taps 13 of the two adjacent coils 8 and the protruding part 14 from the commutator skeleton are connected. A piece of copper sticking out from the middle is welded to the electrode 2 of the ring capacitor I, so as to realize the electrical connection of the ring capacitor I, the coil 8 and the commutat...

Example

[0064] Further as a preferred embodiment, the components of the capacitor ceramic substrate and the second specific embodiment of the preparation method are as follows: First, the SrCO is mixed by ball milling. 3 and TiO 2 , where SrCO 3 The amount of substance with TiO 2 The amount ratio of the materials is 1.0; after mixing and drying, solid-phase synthesis powder at 1000 ℃-1300 ℃ to obtain SrTiO 3 powder;

[0065] in SrTiO 3 Add semiconducting agent Nb to powder 2 O 5 , La 2 O 3 , Ta 2 O 5 One or more of etc., and the additive MnCO is added at the same time 3 , SiO 2 , Na 2 CO 3 , Li 2 CO 3 , CuO, etc. one or more;

[0066] The content of the semiconducting agent is 0.1%-8% of the amount of the synthetic powder material, and the total amount of the remaining additives is 0.3%-5% of the amount of the synthetic powder material;

[0067] Press the prepared and mixed ceramic material to form a strontium barium calcium titanate ceramic blank;

[0068] The ceram...

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Abstract

The invention discloses a capacitor and a permanent magnetic direct-current motor. The capacitor comprises a capacitor ceramic base sheet and at least three electrodes arranged on the capacitor ceramic base sheet. The capacitor ceramic base sheet is shape of a ring or a polygon. The capacitor is used on the permanent magnetic direct-current motor. When the motor is running, voltage between a commutator and an electric brush is rapidly reduced by charging the capacitor, so sparks caused by rotation of the motor are reduced or restrained and service lifetime of the motor is greatly extended. Via the capacitor, it can be ensured that the motor can pass the EMC test. The capacitor can be simply welded, installed and manufactured in the traditional dry pressing technique, has high dielectric constant, complex structure and small size, has no redundant lead wires and can be firmly fixed on a motor rotator. The capacitor and the permanent magnetic direct-current motor can be widely applied in capacitor technology field.

Description

technical field [0001] The invention relates to the technical field of capacitors and motors, in particular to a capacitor and a permanent magnet DC motor. Background technique [0002] During the high-speed operation of the permanent magnet DC motor, the brushes and the commutator are repeatedly and rapidly switched on and off. At the moment when the brushes and the commutator are disconnected, the inductive load circuit containing the coil generates a large counter electromotive force, which often leads to electric current Sparks appear between brushes and commutators. On the one hand, it will affect the life of brushes and commutators, and even damage the motor. On the other hand, the signal noise generated by sparks will affect the power supply and related electronic devices. [0003] One of the easiest ways to suppress an inductive load transient is to connect a capacitor across it. Shenzhen Weizhen Motor Co., Ltd. has disclosed a patent (authorized announcement number...

Claims

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Application Information

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IPC IPC(8): H01G4/12H01G4/228H02K11/026
Inventor 汪小明许贝王学钊周水明
Owner GUANGZHOU MAGNET ELECTRICITY
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