Asynchronous starting and permanent magnet synchronous submersible pump motor

Abstract

The invention relates to an asynchronous starting and permanent magnet synchronous submersible pump motor. A rotating shaft of a rotor passes through a central hole of a rotor core and is arranged in the rotor core in a penetrating mode; a stainless steel jacket wraps outside the rotor core; a round empty slot is formed along the circumference of the rotor core and passes through the whole rotor core; an aluminum conducting bar is cast in the round empty slot in a penetrating mode; an end ring is cast outside the round empty slot to form a totally closed rotor cage; the inner side of the round empty slot is provided with a trapezoidal empty slot; magnetic steel is embedded into the trapezoidal empty slot and passes through the whole rotor core; the length of the trapezoidal empty slot is more than the width of the magnetic steel; a gap is reserved between two ends of the trapezoidal empty slot in which the magnetic steel is arranged to form a magnetic isolating gap; the rotor at the two ends of the magnetic steel is provided with an arresting device; and a stator is pressed in the shell of a pump body and is opposite to the rotor. The asynchronous starting and permanent magnet synchronous submersible pump motor has the advantages of improving efficiency, reducing volume under the same power, saving materials, overcoming the long-term corrosion of fuel oil on the stator and the rotor by shielding the stator and the rotor with the stainless steel jacket, contributing to pumping various oil bodies, along with asynchronous starting and the function of a synchronous motor.

Description

technical field [0001] The invention belongs to the field of electric motors, and relates to an asynchronous start permanent magnet synchronous submersible oil pump motor, which is especially suitable for gas stations to pump fuel from underground oil tanks into automobile fuel tanks. Background technique [0002] Usually submersible pump motors use ordinary single-phase or three-phase asynchronous induction motors. The motor is composed of a stator and a rotor. The stator is laminated with punched silicon steel sheets to form an iron core, and a copper core winding is installed in the iron core punching groove. When the copper core winding is energized, a rotating magnetic field is generated to drive the rotor to run. The rotor is also laminated with punched silicon steel sheets to form an iron core, which is die-cast into a guide bar in the iron core punching groove, and cast into an end ring outside the punching groove to form a fully enclosed squirrel cage. , affected b...

AI Technical Summary

Problems solved by technology

Due to the use of asynchronous induction motors, there are inevitably the following disadvantages: ① out of step phenomenon, because it is an asynchronous motor, the stator and rotor cannot be synchronized, and the speed is lower than the synchronous speed, which is easily affected by the load and the number of revolutions fluctuates

② What's more serious is that the efficiency is low

③The use of common synchronous motors is complicated in control and difficult in maintenance

Images