64results about How to "Reduce motor cost" patented technology

A motor starter for use with a motor (20) having a main winding (M) and a start winding (S). The starter has a PTC thermistor (30) connected in series with the start winding (S). A triac (40) is connected between PTC thermistor (30) and a power source line. A control circuit (50) is connected to the power source line for providing a voltage for a gate terminal (G) of triac (40) and an overload relay (60) is connected between the power source (10) and the motor (20). The control circuit (50) preferably includes a current detecting circuit (52) for detecting the inrush current and a voltage generating circuit (54) for generating the voltage in response to the detected inrush current. At the startup of motor (20) the control circuit (50) allows triac (40) to turn on by providing the gate terminal (G) with the voltage based on the inrush current. According to this invention, the power consumption of the start winding S after the startup of the motor (20) can be almost zero thus providing low power consumption. In another embodiment not employing a PTC thermistor, a current detecting circuit and a voltage generating circuit are used to control the on and off states of a first triac (90) which in turn controls the on and off states of a second triac (92) connected in series with the start winding.

There is provided a device for correcting a Hall sensor installation position error in a BLDC motor which includes a rotor with a permanent magnet, a stator wound with coils to form a magnetic field around the rotor, and three linear Hall sensors installed outwardly around the rotor to generate output signals by the Hall-Effect, the device comprising: a detection unit to detect output signals H₁, H₂, H₃ output from the three linear Hall sensors; a transformation unit to transform the output signals H₁, H₂, H₃ detected in the detection unit to orthogonal two-phase transformation signals H_a, H_b and to transform the transformation signals H_a, H_b to normalized transformation signals H_an, H_bn; an operation unit to calculate a rotation angle of the motor from the normalized transformation signals H_an, H_bn output in the transformation unit; and a control unit to control the current supplied to the coils winding the stator based on information of the rotation angle transmitted from the operation unit, wherein the transformation unit transforms the output signals H₁, H₂, H₃ to the orthogonal two-phase transformation signals H_a, H_b by Clarke Transformation.

Provided is a driving motor that will meet the requests of making the length of a rotating axis of the driving motor to be shorter in the axial direction, and which will also have waterproof, vibration resistance, and soundproof characteristics. In this driving motor (3); a motor interior-space (35) is formed by a housing (21) that has a first and second opening and which is formed to be cylinder shaped, and a flange (22) that blocks the second opening of this housing (21); and a stator assembly (18), a rotor assembly (20), a lower-side end section of the rotating axis (12) that has been placed lower than the flange (22) up until now, and a control circuit-board (19) are all made to be contained in this motor interior-space (35). Furthermore, a ring-shaped elastic member (45) is made to interpose between the upper-side end section of the rotating axis (12) and the first opening of the housing (21); and the lower-side end section of the rotating axis (12), the stator assembly (18), and the rotor assembly (20) are made to be fixed to the flange (22) through a mounting elastic member (59).

A motor water-cooling structure and a manufacturing method thereof are disclosed. The motor water-cooling structure includes a motor case having a wall portion and a tube. The tube is embedded in the wall portion to serve as a flow passage. To manufacture the motor water-cooling structure, the tube is positioned in a mold cavity of a mold, and the motor case is formed in the mold by pour molding to embed the tube therein, so that the motor case and the tube form an integral body. With the manufacturing method, the motor water-cooling structure can be formed with reduced material, labor and time to save the manufacturing costs, and the risk of water leakage can be avoided.

A method for assembling a heat-dissipating module includes a step of mechanically pressing one time or multiple times a heat pipe into a trough of a metallic base, whereby at least one end of the heat pipe can be pressed into the trough of the metallic base and thus firmly combined with the metallic base. In this way, the time and the cost for assembly are reduced, and the yield is increased.

A motor system includes an air core motor having a rotor with opposed permanent magnet poles defining therebetween a magnetic airgap and driving magnetic flux across the magnetic airgap. A stationary armature with air core windings is located within the magnetic airgap. The permanent magnet poles produce a magnetic flux density through the air core windings to produce a back emf in the windings comparable to the voltage of the line power when the rotation of the permanent magnet poles is synchronous with the line power. A electronic variable speed drive coupled by a switch to the air core windings ramps up the frequency of power to the air core windings for accelerating the rotor to near line synchronous speed. When the frequency of the back emf approaches the frequency of the line power, the switch decouples the electronic variable speed drive and couples the air core windings to the line power for synchronous operation.

Provided are a motor and a washing machine using the motor. The motor has a stator, a rotor, a rotor frame, a permanent magnet, and a comb polarizing ring. The rotor rotates against the stator. The permanent magnet is installed on the rotor frame and has protrusions with alternating North and South polarities. The comb polarizing ring includes a plurality of teeth disposed between the protrusions of the permanent magnet, and is formed of a material with a magnetism that is weaker than a magnetism of the protrusions.

A pump with a motor includes a pump housing, a motor housing, and a connecting structure configured to connect the motor housing to the pump housing. The connecting structure includes a motor connecting portion provided at an end of the pump housing, and a pump connecting portion provided at an end of the motor housing. The motor connecting portion includes a bearing configured to rotatably support the other end of the rotating shaft whose one end supported by the motor housing, a plurality of through holes, and projections projecting to the side of the motor housing. The pump connecting portion includes a first hole in which the bearing is fitted, a plurality of connecting pieces inserted into the plurality of through holes, respectively, and caulked on the motor connecting portion, and second holes in which the projections are fitted.

An electric motor includes a stator and a rotor installed in the stator. The stator has a laminated stator core and at least two stator windings wound on the stator core. The stator core has at least two stator poles facing the rotor and at least two yokes connecting adjacent stator poles. T stator core is constituted by at least two separate members joined together. The at least two stator poles are only arranged at a single one of the at least two separate members.

The invention discloses an axial non-uniform air gap hybrid excitation synchronous machine which comprises a housing, a stator and a rotor which are arranged in the housing, an annular magnetism conducting bridge and a rotating shaft which are fixed on an end cover, wherein the stator comprises a stator iron core and an armature winding embedded in a stator groove; and the rotor is fixed on the rotating shaft and comprises a rotor N pole shoe, a rotor S pole shoe and a tangential magnetization permanent magnet. The axial length of the permanent magnet is less than that of the stator iron core. A rotor N pole and an S pole hole respectively are a permanent magnet side adjacent to the permanent magnet and an electric excitation side which is not adjacent to the permanent magnet, and the lengths of two sections of main gas gaps formed between the rotor permanent magnet side and the stator iron core and between the electric excitation side and the stator iron core are different. The motor is wide in regulating range of the magnetic fields of the air gaps, can realize field weakening control in a wide rotating speed range under a speed regulation state, voltage regulation under a power generation state, and complete field suppression protection under a failure state, and has an important application value in a new energy automobile and an independent source system.

A brushless DC motor operated by a microcontroller has a unique pole construction that enables it to reliably start and operate as a unipolar device so that a reduced number of electronic power switches can be used to reduce cost and complexity. The microcontroller calculated rotor position to eliminate the need for a separate sensor and thereby further reduce manufacturing cost.

A motor having a sleeve, a first board, a second board, a rotating part, a stator, a bracket and a bearing. The sleeve includes a sleeve main body having a cylindrical part into which a shaft is inserted, a first board supporting part having a first board supporting area extending in a radial direction of the cylindrical part, and a second supporting part having a second board supporting area that extends in a radial direction of the cylindrical part and is formed apart from the first board supporting area in an axial direction of the cylindrical part. The first board has a first through hole into which the sleeve main body and the second board supporting part are inserted and is fixed to the first board supporting area. The second board has a second through hole into which the sleeve main body is inserted and is fixed to the second board supporting area.

The present invention is one kind of constant power control structure for hydraulic press and its control process. The constant power control structure consists of one PLC, one turnable operation box, one branching unit, one slide block rotating coder, one hydraulic cushion rotating coder, and one proportional amplifier board. The proportional amplifier board is connected to one DC power source, one proportional electromagnet, one valve core displacement sensor and one swing angle sensor of the tilting mechanism. The constant power control process includes: calculating the power, regulating the voltage to obtain the calculated power and transmitting the voltage to the PLC via the RS232 port, and applying the voltage to the motor with the PLC. The present invention has low cost, saving in energy, good hydraulic press controlling effect and stable and reliable operation.

Disclosed is a motor including a housing having a first receiving part formed at one side thereof, a stator disposed in the housing, a rotor disposed in the housing, a rotating shaft rotated along with the rotor, a holder coupled to one side of the housing, and a bearing disposed between the first receiving part and the holder to support a rotation of the rotor.