WO2015135356A1 - 一种制动装置、具有此装置的洗衣机及洗衣机的控制方法 - Google Patents

一种制动装置、具有此装置的洗衣机及洗衣机的控制方法 Download PDF

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Publication number
WO2015135356A1
WO2015135356A1 PCT/CN2014/094400 CN2014094400W WO2015135356A1 WO 2015135356 A1 WO2015135356 A1 WO 2015135356A1 CN 2014094400 W CN2014094400 W CN 2014094400W WO 2015135356 A1 WO2015135356 A1 WO 2015135356A1
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WIPO (PCT)
Prior art keywords
arc
inner cylinder
washing machine
motor
induction part
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PCT/CN2014/094400
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English (en)
French (fr)
Inventor
劳春峰
尹翔
Original Assignee
海尔集团技术研发中心
海尔集团公司
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Application filed by 海尔集团技术研发中心, 海尔集团公司 filed Critical 海尔集团技术研发中心
Publication of WO2015135356A1 publication Critical patent/WO2015135356A1/zh

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/26—Casings; Tubs
    • D06F37/267—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door

Definitions

  • the invention relates to a braking device, a washing machine and a control method of the washing machine, and belongs to the field of washing machine devices and control methods.
  • the current braking method of the pulsator washing machine is to set the brake mechanism on the coupling as shown in Figure 1 and 2.
  • the tension spring 3 pulls the brake arm 8 to approach the brake disc 1, through the brake block 7 and the brake disc 1.
  • the frictional force between the brakes will eventually stop the motor shaft 2 from rotating.
  • This method uses a mechanical method. Over time, the brake block will wear out smaller and smaller, and the tension spring will also fail, causing the brakes to be insensitive or even unable to brake.
  • the technical problem to be solved by the present invention is to overcome the shortcomings of the prior art, and provide a braking device, a washing machine with the device, and a control method of the washing machine. After the braking device is installed, the washing machine adopts a magnetic braking non-contact system. To prevent brake failure caused by contact brake wear.
  • a braking device includes a controller, a frequency converter, an arc-shaped motor and an induction part.
  • the arc-shaped motor is arranged on the outer drum of the washing machine.
  • the inner drum of the washing machine is provided with an induction part.
  • the induction part is adapted to the height of the arc-shaped motor.
  • the motor is electrically connected to the frequency converter, and the frequency converter is electrically connected to the controller; the controller controls the frequency converter to output current to the arc motor so that the arc motor generates a magnetic field, and the induction part receives the magnetic force to brake the rotation of the inner cylinder.
  • a speed sensor which is electrically connected to the controller, and the speed sensor is used to detect the speed of the inner cylinder.
  • the arc-shaped motor is located on the upper part of the outer cylinder, and the induction part is located on the upper part of the inner cylinder.
  • the induction part is an annular magnetic conductive plate, which is sleeved on the inner cylinder and fixed to the inner cylinder; or a part of the inner cylinder itself is an induction part, and the induction part is a magnetically conductive material.
  • a braking device includes a controller, a frequency converter, an arc motor, an electromagnet, and an induction part.
  • the arc motor and the electromagnet are arranged on the outer drum of the washing machine.
  • the inner drum of the washing machine is provided with an induction part, the induction part and the arc motor,
  • the height of the electromagnet is adapted, the arc motor and electromagnet are both electrically connected to the frequency converter, and the frequency converter is electrically connected to the controller; the controller controls the frequency converter to To
  • the electromagnet is energized, so that the induction part receives the magnetic force in the magnetic field generated by the electromagnet to brake the rotation of the inner tub of the washing machine.
  • the speed sensor which is electrically connected to the controller, the speed sensor is used to detect the speed of the inner cylinder, and the speed sensor is installed inside the outer cylinder.
  • the electromagnets are uniformly arranged on the outer cylinder, and the electromagnets and the arc-shaped motor are arranged at intervals on the circumference of the same height, and are adapted to the height of the induction part on the inner cylinder.
  • a washing machine includes the braking device described in any one of the above.
  • a control method for washing machine through the controller to control the inverter output current to the arc motor, the induction part of the inner cylinder is subjected to the magnetic force in the magnetic field generated by the arc motor, and then the inner cylinder rotates.
  • the rotation of the inner cylinder needs to be stopped , The rotation of the inner cylinder is braked by the reverse magnetic force.
  • the magnetic force for braking the rotation of the inner cylinder is obtained by changing the current.
  • the rotation speed of the inner cylinder is detected, and the current is changed according to the rotation speed.
  • the present invention has the following beneficial effects compared with the prior art.
  • the present invention is a braking device.
  • the arc motor is fixedly mounted on the outer tube of the washing machine, the induction part is on the inner tube of the washing machine, and the arc motor is adapted to the height of the induction part.
  • the arc motor generates a changing magnetic field when it is energized, and induces The part generates an induced current in the changing magnetic field, and then the induction part is subjected to magnetic force, so that the entire inner cylinder is forced to realize the rotation of the inner cylinder around its central axis.
  • the controller transmits a signal to the inverter, and controls the inverter to change the direction of the current output to the arc motor, thereby changing the arc motor’s magnetic field, so that the magnetic force received by the induction part is the same as the previous magnetic force received.
  • the inner drum of the washing machine can be braked.
  • Adopt non-contact brake no mechanical friction, which can prevent brake failure caused by contact brake wear.
  • an arc-shaped motor generates a changing magnetic field when it is energized, an induction part generates an induced current in the changing magnetic field, and then the induction part is subjected to magnetic force, so that the inner cylinder is forced to realize the inner cylinder around it.
  • the rotation of the central axis The rotation of the central axis.
  • the controller transmits the signal to the inverter, and the inverter cuts off the arc motor, energizes the electromagnet, and the direction of the current output from the inverter to the electromagnet is the same as the current output to the arc motor before
  • the induction part receives the magnetic force in the changing magnetic field generated by the electromagnet, and this magnetic force is opposite to the direction of the magnetic force received in the magnetic field generated by the arc motor. Therefore, the inner cylinder originally faces in the magnetic field generated by the arc motor. Rotate in one direction, and now the magnetic field generated by the electromagnet is resisted by the magnetic force to realize the braking of the inner tub of the washing machine.
  • Adopt non-contact brake no mechanical friction, which can prevent brake failure caused by contact brake wear.
  • a washing machine of the present invention includes a braking device that uses magnetic force to brake.
  • the controller controls the direction of the current output from the frequency converter to the arc motor or the electromagnet so that the magnetic force received by the induction part of the washing machine inner barrel is the same as the previously received magnetic force.
  • the direction is opposite to realize the inner cylinder braking.
  • the control method of a washing machine of the present invention changes the direction of the magnetic force received by the induction part of the inner tub of the washing machine by changing the direction of the current, so that the induction part of the inner tub is subjected to reverse magnetic resistance, thereby realizing the braking of the inner tub.
  • magnetic non-contact braking it overcomes the shortcomings of braking failure caused by the wear of mechanical contact braking.
  • Fig. 1 is a schematic diagram of the brake mechanism provided in the background art when it is not working.
  • Fig. 2 is a schematic diagram of the structure of the brake mechanism provided in the background art when working.
  • Fig. 3 is a schematic diagram of the installation of the arc-shaped motor on the outer tub of the washing machine in the first embodiment of the present invention.
  • FIG. 4 is a schematic diagram of the installation of the arc-shaped motor and the electromagnet on the outer tub of the washing machine in the second embodiment of the present invention.
  • Brake disc 1. Brake disc 2. Motor shaft 3. Tension spring 4. Brake block 5. Brake boom 6. Outer cylinder 7. Inner cylinder 8. Arc motor 9. Electromagnet.
  • a braking device includes a controller, an arc motor, a frequency converter, an induction part and a speed sensor.
  • the arc motor is fixedly installed on the outer drum of the washing machine.
  • the inner drum of the washing machine is equipped with an induction part.
  • the induction part is adapted to the height of the arc motor.
  • the arc motor is electrically connected to the frequency converter, the frequency converter is electrically connected to the controller installed in the washing machine; the speed sensor is electrically connected to the controller, and the speed sensor is used to detect the speed of the inner cylinder.
  • the controller adopts PLC.
  • the bottom of the inner tub of the washing machine and the bottom of the outer tub are connected by a shaft, the arc-shaped motor 8 is located on the upper part of the outer tub 6, and the induction part is located on the upper portion of the inner tub 7.
  • the PLC transmits the signal to the frequency converter to make the frequency converter output current to the arc motor.
  • the arc motor is energized to generate a changing magnetic field.
  • the induction part generates an induced current in this changing magnetic field, and then the induction part is subjected to magnetic force. Because the induction part is on the inner tube of the washing machine, the entire inner tube is stressed and the inner tube is wound around it. The rotation of the central axis.
  • the speed sensor is installed on the inner side of the outer cylinder and aligned with the inner cylinder. As the clothes in the inner tube may be unbalanced and the inner tube is eccentric, the inner tube may shift from its normal position when rotating and collide with the outer tube.
  • the inner drum of the washing machine and the bottom of the outer drum are connected by a shaft, so the upper end of the inner drum is shifted by a large amount when the inner drum rotates. Therefore, the speed sensor is installed in the middle or lower part of the inner drum to prevent the inner drum from hitting.
  • the induction part is an annular magnetic conductive plate, which is sleeved on the inner cylinder and fixed with the inner cylinder.
  • the feeling To The corresponding part can also be integrally formed with the inner tube of the washing machine, a part of the inner tube itself is the induction part, and the induction part is made of magnetic conductive material.
  • the arc motors are arranged in pairs and fixedly installed on the wall of the washing machine outer cylinder symmetrically.
  • the inverter is required to continuously change the arc The direction of the output current of the shaped motor.
  • the PLC transmits the signal to the inverter, and controls the inverter to change the direction of its output current to the arc motor, thereby changing the magnetic field generated by the arc motor and changing the direction of the magnetic force received by the induction part. In this way, the inner cylinder can rotate counterclockwise in the opposite direction.
  • the PLC transmits the signal to the inverter, and controls the inverter to change the direction of its output current to the arc motor again, thereby changing the magnetic field generated by the arc motor and changing the direction of the magnetic force received by the induction part.
  • the inner cylinder rotates clockwise. Circulate in order to carry out washing.
  • the PLC transmits the signal to the inverter, and controls the inverter to change the direction of the output current output to the arc motor, thereby changing the magnetic field generated by the arc motor and making the induction part
  • the direction of the received magnetic force changes, and the direction of the magnetic force received by the sensing part is opposite to the direction of the magnetic force previously received by the sensing part.
  • the induction part receives the reverse force, so that the original clockwise rotation of the inner cylinder is blocked, and the speed is gradually reduced until it becomes zero, so as to realize the braking of the inner cylinder of the washing machine.
  • the PLC causes the inverter to change the direction of the output current output to the arc motor, thereby changing the magnetic field generated by the arc motor, and changing the magnetic force received by the induction part.
  • Direction so that the original counterclockwise rotation of the inner cylinder is blocked, and the speed is gradually reduced until it becomes zero, so that the inner cylinder can brake.
  • the current output of the inverter is stopped to make the arc shape.
  • the motor does not generate a magnetic field, so the induction part on the inner cylinder is no longer subject to magnetic force, and the inner cylinder will not continue to rotate.
  • the rotation speed of the inner cylinder is detected by the speed sensor.
  • the PLC will change the current provided by the inverter to the arc motor according to the speed information detected by the speed sensor, so as to realize the inner cylinder braking.
  • Set the speed sensor to detect the speed of the inner cylinder, and transmit the signal to the PLC.
  • the PLC controls the inverter to stop the current output to the arc motor, so that the arc motor does not generate a magnetic field, and the inner cylinder is The sensing part is no longer subject to magnetic force, and the inner cylinder will not continue to rotate.
  • the arc-shaped motor can be directly fixed on the wall of the outer cylinder, or can be fixedly connected to the outer cylinder through an arc-shaped motor fixing bracket and a connecting rod.
  • the arc-shaped motor is fixedly connected to the outer cylinder through the arc-shaped motor fixing bracket and the connecting rod.
  • the arc-shaped motor fixing bracket is arc-shaped, one side of which matches the shape of the outer drum of the washing machine, and the arc-shaped motor fixing bracket is located on the outside of the outer drum To It is attached to but not fixed to the outer cylinder, and the arc-shaped motor is fixed on the arc-shaped motor fixing bracket and is attached to the outer cylinder.
  • One end of the connecting rod is connected with the arc-shaped motor fixing bracket, and the other end is connected with the top of the outer cylinder.
  • the connecting rod hangs the arc-shaped motor fixing bracket on the outside of the outer cylinder.
  • the motor fixing device of the washing machine further includes an upper fixing bracket.
  • the upper fixing bracket is fixed on the top end of the outer cylinder, and the outer edge thereof exceeds the outer edge of the outer cylinder, and the two ends of the connecting rod are respectively connected with the arc-shaped motor fixing bracket and the upper fixing bracket.
  • the longitudinal section of the arc-shaped motor fixing bracket is [shaped, consisting of an upper plate, a lower plate and a vertical plate, and the vertical plate is attached to the outer cylinder. Due to the larger contact area between the vertical plate and the outer cylinder, the deformation of the outer cylinder caused by the inner cylinder hitting the outer cylinder can be better prevented.
  • the arc motor fixing bracket Since the arc motor fixing bracket is located on the outside of the outer cylinder, one end of the connecting rod is connected to the part of the upper fixing bracket beyond the outer edge of the outer cylinder and fixed by a nut, and the other end is connected to the upper and lower plates of the arc motor fixing bracket and is fixed by a nut Fix, keep the connecting rod in a vertical state, and connect the connecting rod vertically to the upper fixing bracket and the arc-shaped motor fixing bracket. In this way, the arc-shaped motor fixing bracket can be more conveniently installed coaxially with the outer cylinder.
  • the arc-shaped motor fixing bracket is located close to the upper port of the inner cylinder 1 in height, and is arranged on the outside of the outer cylinder. Since the inner cylinder hits the outer cylinder through its upper end, the arc-shaped motor fixing bracket installed at this position can effectively protect the outer cylinder from deformation when the inner cylinder hits.
  • each arc-shaped motor fixing bracket There are multiple connecting rods connected to each arc-shaped motor fixing bracket, preferably three rigid connecting rods.
  • the three connecting rods can make the connection between the arc motor fixing bracket and the upper fixing bracket at the upper end of the outer cylinder more stable, so that the relative position between the arc motor fixing bracket and the upper fixing bracket at the upper end of the outer cylinder is not easy to change, thereby making the arc shape The relative position between the motor fixing bracket and the outer cylinder is not easy to change.
  • the outer tub is mounted on the frame of the washing machine through four booms, so that the inner tub and the outer tub are suspended inside the frame of the washing machine.
  • the arc-shaped motor fixing bracket can play a supporting role and protect the outer cylinder from deformation.
  • the arc motor fixing bracket is used as the installation fixing bracket of the arc motor, and the arc motor is installed on it, so that the arc motor is installed on the outer cylinder through the motor fixing device, and moves together with the slight movement of the outer cylinder, which is effective This ensures the gap between the inner cylinder and the outer cylinder arc motor, which can prevent the outer cylinder from deforming to cause the inner cylinder and the outer cylinder arc motor gap to be too large, resulting in the arc motor installed on the outer cylinder and the inner cylinder The electromagnetic induction between the induction devices is poor.
  • the arc-shaped motor fixing bracket is located on the outside of the outer cylinder and is attached to but not fixed to the outer cylinder, and the arc-shaped motor is fixed. To It is fixed on the arc-shaped motor fixing bracket and fits with the outer cylinder.
  • the braking device of the embodiment of the present invention uses the changing magnetic field generated by the arc motor to induce the magnetic force generated by the induction part on the inner cylinder to drive the inner cylinder to rotate for washing, and use the PLC to control the frequency converter to change the arc shape.
  • the direction of the output current of the motor realizes the forward and reverse rotation of the inner cylinder, and can also realize the braking of the inner cylinder.
  • the invention uses the principle of electromagnetic induction to rotate the inner cylinder and brake the inner cylinder, no traditional mechanical braking is required, and the braking can be achieved well without the braking caused by the wear or fatigue of the braking device. Failure conditions.
  • the arc-shaped motor fixing bracket can also protect the outer cylinder, reducing the deformation of the outer cylinder caused by collision when the inner cylinder is out of balance.
  • the washing machine brake device further includes an electromagnet 9.
  • electromagnets 9 there are multiple electromagnets 9 and they are all electrically connected to the frequency converter.
  • the electromagnets 9 are evenly arranged in On the outer wall of the outer tub 6 of the washing machine.
  • There are two arc-shaped motors 8 which are symmetrically installed on the outer cylinder, and the arc-shaped motors are electrically connected with the frequency converter.
  • the electromagnet and the arc-shaped motor are staggered in height, and both the arc-shaped motor and the electromagnet are adapted to the height of the induction part on the inner cylinder.
  • the arc motor is used to control the rotation of the inner cylinder, and the electromagnet is responsible for the braking of the inner cylinder.
  • the controller controls the frequency converter to energize the arc motor and the electromagnet wheel.
  • the PLC controls the inverter to output current to the arc motor, and the arc motor is energized but the electromagnet is not energized.
  • the arc motor is energized to generate a changing magnetic field.
  • the induction part generates an induced current in the changing magnetic field, and then the induction part is subjected to magnetic force. Because the induction part is on the inner tube of the washing machine, the inner tube is forced to realize the inner tube around its center. The rotation of the shaft.
  • the inverter When washing normally, because the inner drum of the washing machine needs to rotate clockwise and counterclockwise continuously to make the water and clothes inside the inner drum rub against washing, it is necessary for the inverter to continuously change the direction and direction of the current output to the arc motor.
  • the direction of the output current of the electromagnet, and the arc motor and the electromagnet are not energized at the same time, and the direction of the inverter output current to the arc motor is different, and the direction of the inverter output current to the electromagnet is different ,
  • the direction of the inverter's output current to the electromagnet is also different from the direction of the previous adjacent inverter's output current to the arc motor.
  • the inverter when the washing machine is working normally and washing, the inverter outputs current to the arc motor for the first time, and the arc motor is energized to make the inner cylinder rotate clockwise. After a certain period of rotation, the controller transmits the signal to the inverter, and the inverter controls the arc.
  • the electromagnet When the electric motor is cut off, the electromagnet is energized, the electric current is output to the electromagnet for the first time, and the direction of the electric current output to the electromagnet for the first time is opposite to that of the arc motor.
  • the electromagnet is energized to produce a changing magnetic field, and the sensing part changes here To
  • the induction current is generated in the magnetic field, and the induction part is subjected to the magnetic force. This magnetic force is opposite to the magnetic force received by the induction part in the magnetic field generated when the arc motor is energized for the first time.
  • the cylinder is forced to realize the braking of the inner cylinder.
  • the controller controls the inverter to power off the electromagnet and output current to the arc motor for the second time, and the inverter responds to the current direction of the arc motor's second output current.
  • the current direction of the arc motor's first output current is opposite, so that the inner cylinder rotates counterclockwise.
  • the inverter cuts off the arc motor, outputs current to the electromagnet for the second time, and outputs current to the electromagnet for the second time.
  • the current direction of the output current is opposite to the current direction of the second output current of the inverter to the arc motor.
  • the direction of the inverter's second output current to the electromagnet is also opposite to the direction of the first output current to the electromagnet.
  • the induction part of the inner cylinder receives a magnetic force in the changing magnetic field formed by the electromagnet.
  • the direction of this magnetic force is opposite to the direction of the magnetic force received by the induction part in the changing magnetic field formed by the second energization of the arc-shaped motor, so as to achieve internal Cylinder brake.
  • the inverter cuts off the electromagnet and outputs current to the arc motor for the third time, and the current direction of the third output current of the inverter to the arc motor is the same as that of the arc motor.
  • the current direction of the second output current is opposite, so that the induction part of the inner cylinder is subjected to magnetic force, and the inner cylinder rotates clockwise. Repeat the above actions and proceed in a loop.
  • the PLC transmits the signal to the inverter, and the inverter stops the current output to the arc motor, and starts the current output to the electromagnet, and the current is output to the electromagnet
  • the direction is opposite to the direction of the current output current to the arc motor.
  • the current output by the inverter to the electromagnet energizes the electromagnet and generates a changing magnetic field.
  • the magnetic field generated by the electromagnet is different from the magnetic field generated by the arc motor, so that the magnetic force received by the inductive part in the magnetic field generated by the electromagnet is in the same way as the inductive part.
  • the direction of the magnetic force in the magnetic field generated by the arc motor is opposite, so as to realize the braking of the inner cylinder.
  • the speed sensor detects that the speed of the inner cylinder is zero, the inverter stops outputting current to the electromagnet to achieve complete braking of the inner cylinder.
  • the inner tub it is also possible to control the inner tub to rotate clockwise or counterclockwise only by changing the direction of the current provided by the inverter to the arc-shaped motor when the washing machine is working normally. Only when the inner cylinder needs to be completely braked and the inner cylinder is no longer rotating, the PLC controls the inverter to cut off the arc motor, energize the electromagnet to generate a magnetic field, and change the direction of the magnetic force on the inner cylinder induction part to make it The direction of the magnetic force that drives the inner cylinder to rotate is opposite to achieve the purpose of braking the inner cylinder.
  • the magnetic force generated by the induction part on the inner cylinder is induced by the changing magnetic field generated by the arc-shaped motor energizing the inner cylinder of the washing machine to drive the inner cylinder of the washing machine to rotate for washing, and the PLC control frequency converter is used to change the The direction of the output current of the arc-shaped motor realizes the forward and reverse rotation of the inner cylinder, and the braking of the inner cylinder is realized by the changing magnetic field generated by the electromagnet energization.
  • the invention utilizes the principle of electromagnetic induction to rotate the inner cylinder and brake the inner cylinder, no traditional mechanical braking is required, and the braking effect can be achieved well without the braking caused by the wear or fatigue of the braking device. Dynamic To happening. Moreover, the arc-shaped motor fixing bracket can also protect the outer cylinder, reducing the deformation of the outer cylinder caused by collision when the inner cylinder is out of balance.
  • the washing machine includes a housing, an outer tub, an inner tub, a drain device, and the braking device described in the first embodiment.
  • the arc-shaped motor is energized to generate a changing magnetic field.
  • the induction part of the inner cylinder receives magnetic force in this magnetic field, and the magnetic force drives the inner cylinder to rotate.
  • the PLC as a controller controls the inverter to change the direction of the output current to the arc motor, so that the direction of the magnetic force received by the induction part of the inner cylinder is opposite to the direction of the previous magnetic force, and the induction part of the inner cylinder is subjected to Magnetic resistance stops the rotation and realizes the braking of the inner cylinder.
  • the speed sensor detects that the speed of the inner cylinder is zero, the inverter stops outputting current to the arc-shaped motor to achieve complete braking of the inner cylinder.
  • the washing machine of the present invention uses the principle of electromagnetic induction to rotate and brake the inner drum, adopts a braking device that brakes by magnetic force, and controls the direction of the current output from the frequency converter to the arc motor through the controller, so that the inner drum of the washing machine is The magnetic force received by the sensing part is opposite to the magnetic force received before, and then the inner cylinder is braked.
  • magnetic non-contact braking it overcomes the shortcomings of braking failure caused by the wear of mechanical contact braking.
  • the washing machine includes an outer shell, an outer tube, an inner tube, a drainage device, and the braking device described in the second embodiment.
  • the arc-shaped motor is energized to generate a changing magnetic field.
  • the induction part of the inner cylinder receives magnetic force in this magnetic field, and the magnetic force drives the inner cylinder to rotate.
  • the PLC as a controller controls the inverter to stop outputting current to the arc motor, and start to output current to the electromagnet, and the direction of the current output to the electromagnet is the same as that of the previous output current to the arc motor.
  • the direction of the current is opposite.
  • the magnetic force received by the induction part in the magnetic field generated by the electromagnet is opposite to the direction of the magnetic force received by the induction part in the magnetic field generated by the arc motor.
  • the induction part of the inner cylinder receives the resistance of the magnetic force, due to the design of the induction part. On the inner cylinder, so as to realize the braking of the inner cylinder.
  • the speed sensor detects that the speed of the inner cylinder is zero, the inverter stops outputting current to the electromagnet to achieve complete braking of the inner cylinder.
  • the control method of the washing machine when washing, the controller controls the inverter to make the inverter output current to the arc-shaped motor, the arc-shaped motor generates a changing magnetic field after being energized, and the magnetic force induced by the induction part of the inner cylinder in this magnetic field , Because the sensing part is on the inner cylinder, the inner cylinder is stressed and the inner cylinder rotates around its central axis as a whole.
  • the controller controls the inverter to make the inverter output current to the arc-shaped motor, the arc-shaped motor generates a changing magnetic field after being energized, and the magnetic force induced by the induction part of the inner cylinder in this magnetic field , Because the sensing part is on the inner cylinder, the inner cylinder is stressed and the inner cylinder rotates around its central axis as a whole.
  • the magnetic field generated by the arc motor is changed, and then the direction of the magnetic force received by the induction part of the inner cylinder is changed, which is opposite to the previous
  • the controller When the inner cylinder needs to stop rotating, the controller will send a signal to the inverter, and control the inverter to change the output to the arc-shaped electric To
  • the current direction of the machine changes the magnetic field of the arc-shaped motor, so that the magnetic force received by the induction part of the inner cylinder changes direction.
  • the magnetic force received by the induction part is opposite to the direction of the magnetic force before the induction part, and it is braked by the reverse magnetic force. Rotation of the inner cylinder.
  • the control method of the washing machine of the present invention changes the direction of the current output to the arc motor, so that the magnetic field generated by the arc motor is changed, and the magnetic force received by the inner cylinder induction part in the magnetic field is changed.
  • the inner cylinder is realized by the magnetic force.
  • the brake overcomes the disadvantages of brake failure caused by wear and tear of the existing mechanical contact brake.

Abstract

一种制动装置、具有此装置的洗衣机及洗衣机的控制方法，其中，制动装置包括控制器、变频器、弧形电机（8）和感应部，弧形电机（8）设于洗衣机外筒（6），洗衣机内筒（7）设有感应部，感应部与弧形电机（8）的高度相适应，弧形电机（8）电连接变频器，变频器与控制器电连接。控制器控制变频器输出电流至弧形电机（8）使弧形电机（8）产生磁场，感应部受磁力进而制动内筒的转动。通过控制器控制变频器输出电流至弧形电机（8），使内筒的感应部在弧形电机（8）产生的磁场中受磁力进而使内筒发生转动，当需要停止内筒转动时，通过改变输出至弧形电机（8）的电流方向得到反向的磁力制动内筒的转动。可实现内筒制动而不会发生因制动装置磨损或疲劳而产生的制动失效的情况。

Description

一种制动装置、具有此装置的洗衣机及洗衣机的控制方法 技术领域
本发明涉及一种制动装置、一种洗衣机及洗衣机的控制方法，属于洗衣机装置和控制方法领域。
背景技术
目前波轮洗衣机的制动方式是在联轴器上设置刹车机构如图1、2，当甩干结束时，拉簧3拉动刹车动臂8靠近刹车盘1，通过刹车块7与刹车盘1间的摩擦力进行刹车，最终使电动机轴2停止转动。这种方式采用了机械式，时间久了刹车块会磨得越来越小，拉簧也会失效，导致刹车不灵敏甚至不能刹车。
有鉴于此特提出本发明。
发明内容
本发明要解决的技术问题在于克服现有技术的不足，提供一种制动装置、具有此装置的洗衣机及洗衣机的控制方法，洗衣机安装此制动装置后，采取磁力制动的非接触式制动，防止因接触制动磨损造成的制动失效。
为解决上述技术问题，本发明采用技术方案的基本构思是：
一种制动装置，包括控制器、变频器、弧形电机和感应部，弧形电机设于洗衣机外筒，洗衣机内筒设有感应部，感应部与弧形电机的高度相适应，弧形电机电连接变频器，变频器与控制器电连接；控制器控制变频器输出电流至弧形电机使弧形电机产生磁场，感应部受磁力进而制动内筒的转动。
进一步的，还包括速度传感器，速度传感器与控制器电连接，速度传感器用于检测内筒速度。
进一步的，弧形电机位于外筒的上部，感应部位于内筒的上部。
进一步的，所述感应部为环形导磁板，环形导磁板套在内筒上并与内筒固定；或者内筒自身的一部分为感应部，感应部为导磁材料。
一种制动装置，包括控制器、变频器、弧形电机、电磁铁和感应部，弧形电机、电磁铁设于洗衣机外筒，洗衣机内筒设有感应部，感应部与弧形电机、电磁铁的高度相适应，弧形电机及电磁铁均电连接变频器，变频器与控制器电连接；控制器控制变频器对 电磁铁通电，使感应部在电磁铁产生的磁场中受磁力进而制动洗衣机内筒的转动。
进一步的，还包括速度传感器，速度传感器与控制器电连接，速度传感器用于检测内筒速度，所述速度传感器安装于外筒内侧。
进一步的，电磁铁均匀设置于外筒上，电磁铁与弧形电机在同一高度的圆周上间隔设置，且与内筒上的感应部的高度相适应。
一种洗衣机，包括以上任一项所述的制动装置。
一种洗衣机的控制方法，通过控制器控制变频器输出电流至弧形电机，使内筒的感应部在弧形电机产生的磁场中受磁力进而使内筒发生转动，当需要停止内筒转动时，通过反向的磁力制动内筒的转动。
进一步的，通过改变电流来获得制动内筒转动的磁力。
进一步的，检测内筒的转速，根据所述转速改变电流。
采用上述技术方案后，本发明与现有技术相比具有以下有益效果。
本发明一种制动装置，弧形电机固定安装在洗衣机外筒上，感应部在洗衣机内筒上，弧形电机与感应部的高度相适应，弧形电机在通电时产生变化的磁场，感应部在此变化的磁场中产生感应电流，进而感应部受磁力作用，从而使内筒整体受力实现内筒绕其中心轴的旋转。在内筒需要制动时，控制器将信号传给变频器，控制变频器改变输出至弧形电机的电流方向，从而改变弧形电机的磁场，使感应部所受磁力与之前所受的磁力方向相反，实现洗衣机内筒的制动。采用非接触式制动，没有机械摩擦，可防止因接触制动磨损造成的制动失效。
本发明一种制动装置，弧形电机在通电时产生变化的磁场，感应部在此变化的磁场中产生感应电流，进而感应部受磁力作用，从而使内筒整体受力实现内筒绕其中心轴的旋转。在内筒需要制动时，控制器将信号传给变频器，变频器对弧形电机断电、对电磁铁通电，且变频器输出至电磁铁的电流方向与之前输出至弧形电机的电流方向相反，感应部在电磁铁产生的变化磁场中受磁力，且此磁力与之前在弧形电机所产生的磁场中所受磁力方向相反，因此，内筒原来在弧形电机产生的磁场中朝一个方向转动，现在电磁铁产生的磁场中受磁力阻力从而实现洗衣机内筒的制动。采用非接触式制动，没有机械摩擦，可防止因接触制动磨损造成的制动失效。
本发明一种洗衣机，包括采用磁力进行制动的制动装置，通过控制器控制变频器输出至弧形电机或电磁铁的电流方向，使洗衣机内筒的感应部受到的磁力与之前所受磁力方向相反，进而实现内筒制动。通过磁力的非接触式制动，克服了机械式接触制动的磨损引发制动失效的弊端。
本发明一种洗衣机的控制方法，采用改变电流方向的方式来改变洗衣机内筒感应部所受磁力的方向，使内筒的感应部受反向的磁力阻力，从而实现内筒的制动。通过磁力的非接触式制动，克服了机械式接触制动的磨损引发制动失效的弊端。
下面结合附图对本发明的具体实施方式作进一步详细的描述。
附图说明
图1是背景技术中提供的刹车机构不工作时的结构示意图。
图2是背景技术中提供的刹车机构工作时的结构示意图。
图3是本发明实施例一中弧形电机在洗衣机外筒上的安装示意图。
图4是本发明实施例二中弧形电机及电磁铁在洗衣机外筒上的安装示意图。
1、刹车盘 2、电动机轴 3、拉簧 4、刹车块 5、刹车动臂 6、外筒 7、内筒 8、弧形电机 9、电磁铁。
具体实施方式
实施例一
一种制动装置，包括控制器、弧形电机、变频器、感应部和速度传感器。
弧形电机固定安装在洗衣机外筒上，洗衣机内筒设有感应部，感应部与弧形电机的高度相适应，弧形电机在通电时，感应部受感应而生的磁力从而使内筒旋转，弧形电机电连接变频器，变频器与安装在洗衣机的控制器电连接；速度传感器与控制器电连接，速度传感器用于检测内筒速度。控制器采用PLC。
洗衣机内筒底部与外筒底部通过轴连接，弧形电机8位于外筒6的上部，感应部位于内筒7的上部。
需要洗衣机工作时，PLC将信号传给变频器，使变频器输出电流至弧形电机。弧形电机通电产生变化的磁场，感应部在此变化的磁场中产生感应电流，进而感应部受磁力作用，因为感应部在洗衣机内筒上，从而使内筒整体受力，实现内筒绕其中心轴的旋转。
速度传感器安装于外筒内侧，对准内筒。由于内筒中衣物可能放置不均衡导致内筒偏心，故内筒转动时可能会偏移其正常位置而与外筒发生碰撞。而洗衣机内筒与外筒的底部通过轴连接，故内筒旋转时其上端偏移的量大，因此，速度传感器安装于外筒内侧的中部或下部，以防内筒撞击。
感应部为环形导磁板，环形导磁板套在内筒上并与内筒固定。在其他实施例中，感 应部也可以与洗衣机内筒一体成型，内筒自身的一部分为感应部，感应部为导磁材料。
弧形电机成对设置，对称固定安装在洗衣机外筒壁上。
当正常洗衣时，由于洗衣机的内筒需要不断的顺时针转和逆时针转，利用内筒的正反转使内筒内部的水和衣物摩擦进行洗涤，因此就需要变频器不断的改变对弧形电机输出电流的方向。
内筒在顺时针转动一定时间后，PLC将信号传给变频器，控制变频器改变其对弧形电机输出电流的方向，从而改变弧形电机产生的磁场，使感应部所受磁力改变方向，从而使内筒实现反向的逆时针转动。
内筒逆时针转动一定时间后，PLC将信号传给变频器，控制变频器再次改变其对弧形电机输出电流的方向，从而改变弧形电机产生的磁场，使感应部所受磁力改变方向，内筒顺时针转动。循环进行，以进行洗衣。
在内筒顺时针转动需要完全制动不再转动洗衣时，PLC将信号传给变频器，控制变频器改变输出至弧形电机的输出电流方向，从而改变弧形电机产生的磁场，使感应部所受磁力改变方向，此时感应部所受磁力与感应部之前所受的磁力方向相反。感应部受到反向力，从而使内筒原顺时针方向的旋转受阻，速度逐渐降低直至变为零，实现洗衣机内筒的制动。
同理，在内筒逆时针转动需要完全制动不再转动洗衣时，PLC使变频器改变输出至弧形电机的输出电流方向，从而改变弧形电机产生的磁场，使感应部所受磁力改变方向，使内筒原逆时针方向的旋转受阻，速度逐渐降低直至变为零，从而使内筒实现制动，在内筒速度为零实现制动时，停止变频器的电流输出，使弧形电机不产生磁场，因此内筒上的感应部不再受磁力作用，内筒不会继续转动。
内筒的转速通过速度传感器检测，在速度传感器检测内筒速度的过程中，PLC会根据速度传感器检测到的速度信息来改变变频器提供到弧形电机的电流，从而实现内筒制动。设置速度传感器检测内筒的速度，将信号传至PLC，在内筒转速为零实现制动时，PLC控制变频器停止对弧形电机的电流输出，使弧形电机不产生磁场，内筒上的感应部不再受磁力作用，内筒不会继续转动。
弧形电机可以直接固定在外筒壁上，也可以通过弧形电机固定支架和连杆固定连接在外筒上。
在本实施例中，弧形电机通过弧形电机固定支架和连杆固定连接在外筒上。弧形电机固定支架为弧形，其一侧与洗衣机外筒形状相配合，弧形电机固定支架位于外筒外侧 并与外筒贴合但不固定，弧形电机固定在弧形电机固定支架上并与外筒贴合。连杆一端连接弧形电机固定支架，另一端连接外筒顶端。连杆将弧形电机固定支架吊接在外筒的外侧。
为了使连杆与外筒连接方便，且使弧形电机固定支架与外筒能更方便的同轴安装，本实施例中，洗衣机的电机固定装置还包括上固定支架。上固定支架固定于外筒的顶端，且其外缘超出外筒的外缘，连杆两端分别连接弧形电机固定支架和上固定支架。
弧形电机固定支架的纵截面为[形,由上板、下板和竖板组成，竖板与外筒贴合。由于竖板与外筒的接触面积较大，因此能更好的防止内筒撞击外筒所造成的外筒变形。
由于弧形电机固定支架位于外筒的外侧，因此连杆的一端连接上固定支架超出外筒外缘的部分并通过螺母固定，另一端连接弧形电机固定支架的上板和下板并通过螺母固定，使连杆保持竖直状态，连杆竖直连接上固定支架和弧形电机固定支架。这样，弧形电机固定支架能更方便的与外筒同轴安装。
弧形电机固定支架在高度上位于靠近内筒1上端口的位置，设置于外筒外侧。由于内筒撞击外筒时是通过其上端撞击，因此，弧形电机固定支架安装在此位置能有效地保护外筒在内筒撞击时不变形。
弧形电机固定支架有四个，均匀的设置在外筒外侧。
与每个弧形电机固定支架连接的连杆有多根，优选为三根刚性连杆。三根连杆可以使弧形电机固定支架与外筒上端的上固定支架连接更稳固，使弧形电机固定支架与外筒上端的上固定支架之间的相对位置不容易发生变化，从而使弧形电机固定支架与外筒之间相对位置不容易发生变化。
将外筒通过四个吊杆安装到洗衣机框架上，使内筒和外筒悬置在洗衣机框架的内部。在内筒高速旋转过程中由于偏心力而撞击外筒时，弧形电机固定支架可以起到支撑作用，保护外筒不变形。弧形电机固定支架作为弧形电机的安装固定支架，将弧形电机安装于其上，这样弧形电机通过电机固定装置安装到了外筒上，随外筒的轻微动作而一同动作，这样就有效的保证了内筒与外筒弧形电机之间的间隙，可以防止外筒因为变形导致内筒与外筒弧形电机间隙过大，从而导致安装在外筒上的弧形电机与安装在内筒的感应装置之间电磁感应较差的情况。
本实施例中，弧形电机固定支架位于外筒外侧并与外筒贴合但不固定，弧形电机固 定在弧形电机固定支架上并与外筒贴合。
本发明实施例的一种制动装置，通过弧形电机产生的变化磁场使内筒上的感应部受感应而生的磁力进而带动内筒转动进行洗衣，并利用PLC控制变频器改变对弧形电机的输出电流方向，实现内筒的正反转，也可以实现对内筒的制动。本发明利用电磁感应原理使内筒转动和对内筒制动，不再进行传统的机械式制动，能够很好的实现制动而不会发生因制动装置磨损或疲劳而产生的制动失效的情况。而且弧形电机固定支架还可以对外筒进行保护，减少内筒失衡时碰撞造成的外筒变形。
实施例二
与实施例一不同的是，如图4所示，在本实施例中，洗衣机制动装置还包括电磁铁9，电磁铁9有多个且均与变频器电连接，电磁铁9均匀设置于洗衣机外筒6的外壁上。弧形电机8为两个，对称安装在外筒上，弧形电机与变频器电连接。在本实施例中，电磁铁为4个，与弧形电机在同一高度的圆周上间隔设置，且与内筒上的感应部的高度相适应。
在其他实施例中，电磁铁与弧形电机在高度上相错，且弧形电机、电磁铁均与内筒上的感应部的高度相适应。
采用弧形电机来控制内筒的旋转，而电磁铁则负责内筒的制动。控制器控制变频器对弧形电机和电磁铁轮流通电。
需要内筒转动进行洗衣时，PLC控制变频器输出电流至弧形电机，弧形电机通电而电磁铁不通电。弧形电机通电产生变化的磁场，感应部在此变化的磁场中产生感应电流，进而感应部受磁力作用，因为感应部在洗衣机内筒上，从而使内筒受力，实现内筒绕其中心轴的旋转。
当正常洗衣时，由于洗衣机的内筒需要不断的顺时针转动和逆时针转动，使内筒内部的水和衣物摩擦进行洗涤，因此就需要变频器不断的改变对弧形电机输出电流的方向和对电磁铁输出电流的方向，并且弧形电机和电磁铁不同时通电，且变频器对弧形电机相邻两次输出电流的方向不同，变频器对电磁铁相邻两次输出电流的方向不同，变频器对电磁铁输出电流的方向与之前相邻的变频器对弧形电机输出电流的方向也不同。
因此，洗衣机正常工作洗衣时，变频器第一次对弧形电机输出电流，弧形电机通电，使内筒顺时针转动，转动一定时间后，控制器将信号传给变频器，变频器对弧形电机断电、对电磁铁通电，对电磁铁第一次输出电流，且对电磁铁第一次输出电流的方向与对弧形电机第一次输出电流的方向相反。电磁铁通电产生变化的磁场，感应部在此变化的 磁场中产生感应电流，进而感应部受磁力作用，且此磁力与感应部在弧形电机第一次通电时所产生的磁场中所受磁力相反，因为感应部在洗衣机内筒上，从而使内筒受力，实现对内筒的制动。
当速度传感器检测到内筒速度为零时，控制器控制变频器对电磁铁断电并对弧形电机第二次输出电流，且变频器对弧形电机第二次输出电流的电流方向与其对弧形电机第一次输出电流的电流方向相反，使内筒逆时针转动，转动一定时间后，变频器对弧形电机断电，对电磁铁第二次输出电流，且对电磁铁第二次输出电流的电流方向与变频器对弧形电机第二次输出电流的电流方向相反。变频器对电磁铁第二次输出电流的电流方向与对电磁铁第一次输出电流的电流方向也相反。电磁铁通电后，内筒的感应部在电磁铁形成的变化磁场中受到磁力，此磁力的方向与感应部在弧形电机第二次通电形成的变化磁场中受到的磁力方向相反，从而实现内筒制动。
当速度传感器检测到内筒速度为零时，变频器对电磁铁断电并对弧形电机第三次输出电流，且变频器对弧形电机第三次输出电流的电流方向与其对弧形电机第二次输出电流的电流方向相反，使内筒感应部受磁力，内筒顺时针转动。重复上述动作，循环进行。
当需要对内筒完全制动不再转动洗衣时，PLC将信号传给变频器，变频器停止对弧形电机的电流输出，而开始对电磁铁进行电流输出，且对电磁铁输出电流的电流方向与之前其对弧形电机输出电流的电流方向相反。变频器对电磁铁输出的电流使电磁铁通电并产生变化的磁场，电磁铁产生的磁场与弧形电机产生的磁场不同，使感应部在电磁铁产生的磁场中所受的磁力与感应部在弧形电机产生的磁场中所受的磁力的方向相反，从而实现内筒的制动。当速度传感器检测到内筒的速度为零时，变频器停止对电磁铁输出电流，实现内筒的完全制动。
本发明的其他实施例中，也可以在洗衣机正常洗衣工作时，仅通过改变变频器提供给弧形电机的电流的方向来控制内筒进行顺时针转动或逆时针转动。只有需要对内筒进行完全制动不再进行内筒转动时，PLC控制变频器对弧形电机断电，对电磁铁通电使其产生磁场，通过改变内筒感应部受到磁力的方向，使之与原来驱动内筒转动的磁力方向相反来达到对内筒制动的目的。
本发明实施例的一种制动装置，通过弧形电机通电产生的变化磁场使内筒上的感应部受感应而生的磁力进而带动洗衣机内筒转动进行洗衣，并利用PLC控制变频器改变对弧形电机的输出电流方向，实现内筒的正反转，利用电磁铁通电产生的变化磁场实现内筒的制动。本发明利用电磁感应原理使内筒转动和对内筒制动，不再进行传统的机械式制动，能够很好的实现制动效果而不会发生因制动装置磨损或疲劳而产生的制动失效的 情况。而且弧形电机固定支架还可以对外筒进行保护，减少内筒失衡时碰撞造成的外筒变形。
实施例三
洗衣机，包括外壳、外筒、内筒、排水装置及实施例一中所述的制动装置。
洗衣机在洗衣过程中，弧形电机通电产生变化磁场，内筒的感应部在此磁场中受磁力，磁力驱使内筒转动。在需要内筒停止转动时，PLC作为控制器控制变频器改变对弧形电机的输出电流的方向，使内筒的感应部受到的磁力方向与之前受到的磁力方向相反，内筒的感应部受到磁力阻力，从而停止转动，实现内筒的制动。当速度传感器检测到内筒的速度为零时，变频器停止对弧形电机输出电流，实现内筒的完全制动。
本发明洗衣机，利用电磁感应原理使内筒转动和对内筒制动，采用通过磁力进行制动的制动装置，通过控制器控制变频器输出至弧形电机的电流方向，使洗衣机内筒的感应部受到的磁力与之前所受磁力相反，进而实现内筒制动。通过磁力的非接触式制动，克服了机械式接触制动的磨损引发制动失效的弊端。
实施例四
洗衣机，包括外壳、外筒、内筒、排水装置及实施例二中所述的制动装置。
洗衣机在洗衣过程中，弧形电机通电产生变化的磁场，内筒的感应部在此磁场中受磁力，磁力驱使内筒转动。需要对内筒制动时，PLC作为控制器控制变频器停止对弧形电机输出电流，而开始对电磁铁输出电流，且对电磁铁输出电流的电流方向与之前其对弧形电机输出电流的电流方向相反，感应部在电磁铁产生的磁场中所受的磁力与感应部在弧形电机产生的磁场中所受的磁力的方向相反，内筒感应部受磁力这一阻力，由于感应部设在内筒上，从而实现内筒的制动。当速度传感器检测到内筒的速度为零时，变频器停止对电磁铁输出电流，实现内筒的完全制动。
实施例五
洗衣机的控制方法，在洗衣的时候，控制器控制变频器使变频器输出电流至弧形电机，弧形电机通电后产生变化的磁场，内筒的感应部在此磁场中受感应而生的磁力，由于感应部在内筒上，故内筒受力，内筒整体绕其中心轴旋转。通过改变变频器输出至弧形电机的电流方向，使弧形电机产生的磁场改变，进而使内筒的感应部所受的磁力方向改变，与之前所受磁力方向相反，从而使内筒反向转动。通过多次改变变频器输出至弧形电机的电流方向，使内筒反复的正反转，以实现洗衣。
当需要内筒停止转动时，控制器将信号传给变频器，控制变频器改变输出至弧形电 机的电流方向，从而改变弧形电机的磁场，使内筒的感应部所受磁力改变方向，此时感应部所受磁力与感应部之前所受的磁力方向相反，通过反向的磁力制动内筒的转动。
在对内筒制动时，需要检测内筒转速，根据转速来改变电流。当检测到内筒转速为零时，变频器不再对弧形电机输出电流。
本发明洗衣机的控制方法，通过对输出至弧形电机的电流方向的改变，使得弧形电机所产生的磁场改变，进而使得内筒感应部在磁场中所受的磁力改变，通过磁力实现内筒的制动，克服了现有的机械式接触制动因磨损造成的制动失效的弊端。
上述实施例中的实施方案可以进一步组合或者替换，且实施例仅仅是对本发明的优选实施例进行描述，并非对本发明的构思和范围进行限定，在不脱离本发明设计思想的前提下，本领域中专业技术人员对本发明的技术方案作出的各种变化和改进，均属于本发明的保护范围。

Claims (11)

  1. 一种制动装置，其特征在于：包括控制器、变频器、弧形电机和感应部，弧形电机设于洗衣机外筒，洗衣机内筒设有感应部，感应部与弧形电机的高度相适应，弧形电机电连接变频器，变频器与控制器电连接；
    控制器控制变频器输出电流至弧形电机使弧形电机产生磁场，感应部受磁力进而制动内筒的转动。
  2. 根据权利要求1所述的一种制动装置，其特征在于：还包括速度传感器，速度传感器与控制器电连接，速度传感器用于检测内筒速度。
  3. 根据权利要求1或2所述的一种制动装置，其特征在于：弧形电机位于外筒的上部，感应部位于内筒的上部。
  4. 根据权利要求1或2所述的一种制动装置，其特征在于：感应部为以下任意一种：所述感应部为环形导磁板，环形导磁板套在内筒上并与内筒固定；或者内筒自身的一部分为感应部，感应部为导磁材料。
  5. 一种制动装置，其特征在于：包括控制器、变频器、弧形电机、电磁铁和感应部，弧形电机、电磁铁设于洗衣机外筒，洗衣机内筒设有感应部，感应部与弧形电机、电磁铁的高度相适应，弧形电机及电磁铁均电连接变频器，变频器与控制器电连接；
    控制器控制变频器对电磁铁通电，使感应部在电磁铁产生的磁场中受磁力进而制动洗衣机内筒的转动。
  6. 根据权利要求5所述的一种制动装置，其特征在于：还包括速度传感器，速度传感器与控制器电连接，速度传感器用于检测内筒速度，所述速度传感器安装于外筒内侧。
  7. 根据权利要求5所述的一种制动装置，其特征在于：电磁铁均匀设置于外筒上，电磁铁与弧形电机在同一高度的圆周上间隔设置，且与内筒上的感应部的高度相适应。
  8. 一种洗衣机，其特征在于：包括权利要求1-7任一项所述的制动装置。
  9. 一种洗衣机的控制方法，其特征在于：通过控制器控制变频器输出电流至弧形电机，使内筒的感应部在弧形电机产生的磁场中受磁力进而使内筒发生转动，当需要停止内筒转动时，通过反向的磁力制动内筒的转动。
  10. 根据权利要求9所述的控制方法，其特征在于：通过改变电流来获得制动内筒转动的磁力。
  11. 根据权利要求10所述的控制方法，其特征在于：检测内筒的转速，根据所述转速改变电流。
PCT/CN2014/094400 2014-03-10 2014-12-19 一种制动装置、具有此装置的洗衣机及洗衣机的控制方法 WO2015135356A1 (zh)

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