Motor stators, electric motors and power tools

A motor stator and stator slot technology, which is applied in the field of electric tools and motor stators, to achieve a large power output range, improve torque efficiency, and improve efficiency
CN106816969BActive Publication Date: 2020-07-10BOSCH POWER TOOLS CHINA
8 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
BOSCH POWER TOOLS CHINA
Publication Date
2020-07-10

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a motor stator. The motor stator is provided with at least two magnetic poles and at least two stator coils at a rotor turn-in side and a rotor turn-out side, wherein each magnetic pole is provided with a pole body, a yoke, a pole shoe and two stator slots; the yoke includes a rotor turn-in side yoke and a rotor turn-out side yoke; the pole shoe includes a rotor turn-in side pole arc, a rotor turn-out side pole arc, and a pole shoe surface being opposite to the rotor; the pole shoe surface is provided with symmetric arc cross sections; the stator slots are arranged between the rotor turn-in side yoke and the rotor turn-in side pole arc, and between the rotor turn-out side yoke and the rotor turn-out side pole arc; the stator coils are arranged in the stator slots; and on the radial cross section, the center line of the pole body deviates from the center line of the pole shoe surface to the rotor turn-in side parallelly. The motor stator can improve the efficiency of the stator coils, the power / mass ratio of the motor, and the torque efficiency, and can enable the motor having the same size to have a greater power output range.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to the field of electrical machine components, and more particularly, to an electrical machine stator with an asymmetrical slot, yoke and pole configuration. The invention also relates to a motor including the motor stator and an electric tool including the motor. Background technique

[0002] A motor is often provided in a power tool, typically an AC general-purpose motor. AC general purpose motors generally comprise at least two stator poles with an annular yoke structure forming a symmetrical geometry. The stator coils are located in stator slots or wire slots around the magnetic poles. When energized, the stator coils are energized together with the stator poles to generate an electromagnetic field, which drives the rotor to generate electromagnetic torque.

[0003] In motor design, the area of ​​the stator slot or wire slot is determined according to the expected motor output power and the expected rotor output tor...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More