Permanent magnet linear motor

Abstract

The invention discloses a permanent magnet linear motor. The permanent magnet linear motor comprises a primary assembly; the primary assembly comprises a machine body, primary iron cores, a pluralityof coil windings, cooling connectors and cooling flow channels; the multiple coil windings are in mutual connection and fixed on the primary iron cores; the primary iron cores are fixedly connected with the machine body and positioned in the machine body; the cooling connectors are fixed at one end of the machine body; the outer walls of the cooling flow channels are tightly attached to the primary iron cores and the multiple coil windings; the cooling flow channels comprise top cooling flow channels and side surface cooling flow channels; one ends of the side surface cooling flow channels areconnected with the top cooling flow channels while the other ends are connected with the cooling connectors; and the hole diameters of the cooling flow channels are larger than that of the cooling connectors. According to the permanent magnet linear motor, the cooling flow channels are tightly attached to the primary iron cores and the coil windings to directly cool a heat source, so that a goodeffect is realized; the hole diameters of the cooling flow channels are larger than that of the cooling connectors, so that the refrigerant amount in the cooling flow channels is increased, and machine body temperature rise is suppressed effectively; and in addition, the side surface cooling flow channels are matched with the top cooling flow channels, so that the volume of the refrigerant storedin the machine body is further enlarged.

Description

technical field [0001] The invention relates to a mechanical motor, in particular to a permanent magnet linear motor. Background technique [0002] Permanent magnet linear motors have the dual characteristics of permanent magnet motors and linear motors. They have the characteristics of large thrust, high speed, and small size. They are the first choice for high-speed and high-precision linear feed systems. At present, permanent magnet linear motors are more and more widely used in industrial machinery such as machining centers, PCB drilling machines, forming machines, electrical discharge machines, and gantry systems. In order to solve the problem of poor thermal shock performance, there are usually the following methods: increase the refrigerant flow rate, use a larger refrigerant flow rate to quickly take away the heat from the motor; isolate the machine from the primary component, use other cooling devices to separate the primary and The machine is isolated to prevent t...

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Problems solved by technology

[0003] However, these two commonly used methods have the following defects: the method of increasing the flow rate of the refrigerant has additional requirements for the external cooling pump, the pressure and flow of the refrigerant need to be increased, and the sealing pressure requirements of the motor itself have been greatly increased, which is prone to uneven cooling ; However, the solution of isolating the machine table from the primary components requires additional components, occupying the space of the machine tool and cooling flow, resulting in additional waste

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