146 results about "Centrifugal switch" patented technology

The invention discloses a food waste disposer and a control method thereof. The food waste disposer comprises a food waste inlet, a grinding device, a motor (6) and an electronic centrifugal switch (7), wherein food waste enters the grinding device through the food waste inlet; the motor (6) is connected to the grinding device and drives the grinding device to grind the entered food waste and discharge the ground food waste; the electronic centrifugal switch (7) is connected to the motor (6), the running state of the motor (6) is ensured by synchronously detecting the current value and the voltage value of the motor (6), and further the connection or disconnection of the main winding and / or secondary winding of the motor (6) is controlled according to the running state of the motor (6). According to the scheme, the food waste disposer can overcome the defects of inconvenience in use, short service life and poor universality in the prior art and realize the beneficial effects of convenience in use, long service and good universality.

A protection circuit for a wind turbine generator that includes a PWM Brake that works in conjunction with known Brake Relays is disclosed. The Brake Relay is used to short the generator output terminals at a first threshold voltage. The PWM Brake includes one or more switching devices, coupled across the generator output. The PWM Brake is under the control of a PWM Brake Control Circuit which actuates the PWM Brake at a second threshold voltage that is relatively lower than the first threshold voltage. In accordance with an important aspect of the invention, the PWM Brake Control Circuit includes a novel speed sensing circuit for providing a signal representative of the speed of the turbine generator The novel speed sensing circuit eliminates the need to mount a speed sensor on the pole top mounted turbine generator. As such, the need for adding cabling from the pole top mounted wind turbine generator is eliminated. The novel speed sensing circuit provides a signal representative of the rotational speed of the turbine generator based upon the duty cycle of a pulse width modulated (PWM) signal that is derived from the drive signal developed by the PWM Control Circuit. This signal is used to alternatively actuate and close the Brake Relay to minimize actuation of the centrifugal switch.

A master clutch includes a pressure plate adjacent to a friction disc. A centrifugal weight forces the pressure plate and friction disc into engagement when in a desired install position. A locking device retains the centrifugal weight in the desired installed position. A controller sends an electronic command to a system component, such as an engine, to disengage the locking device. In one example, the electronic command may be an engine speed command that is above an engine speed limit in a normal vehicle operating mode. Commanding the engine to run at a speed greater than the typical engine speed limit moves the centrifugal weight out of the desired installed position making the master clutch operational.

The invention provides a tire pressure monitoring system for motorcycle tires, which essentially comprises a wireless sensor, a central receiver and a display; wherein, the wireless sensor is built-in type. An MEMS pressure sensor, a centrifugal switch and a low-frequency antenna are connected with a numerical signal modulation module; the numerical signal modulation module is connected with a wireless transmitting module; the wireless transmitting module is connected with a transmitting antenna; the central receiver is arranged inside a motorcycle; a receiving antenna is connected with a wireless receiving module; the wireless receiving module is connected with a control module; the control module is connected with a display driving module; the display driving module is connected with the display; the display is integrated in a motorcycle dash board. The system has the advantages of adopting a wireless way to monitor the tire pressure of the tires of the motorcycle in a real-time manner and adopting the MEMS pressure sensor and the centrifugal switch to ensure the tire pressure monitoring system to be reliable, durable, low in energy consumption and long in service life and have the function of display alarm.

A centrifugal switching device of a single-phase induction motor includes a centrifuge and pressure switches. The centrifuge includes a centrifugal sleeve, a centrifugal base, shaft coupling blocks, and a spring. The spring is directly fitted on the centrifugal base. Under a centrifugal force generated by the rotation of the motor, shaft coupling blocks I and II slide axially against an axial force of the spring, thus forcing an axial end surface of the centrifugal sleeve to be separated from contacts of the pressure switches, such that a starting winding of a stator ferrite-core coil of the single-phase induction motor is disconnected and a heater is turned on. The shaft coupling blocks I and II adopt a design with round transition, central sliding contact, and smooth rotation, thereby achieving a simple structure, convenient mounting, and safety usage.

A kind of centrifugal switch of split-phase motor, includes: sleeve, it is inserted into the limitative units of axis, and forms a flange part over its outer circumference; sliding block, it lies in the outer side of above-said sleeve, and is inserted movably along the axis direction of above-said sleeve, and then disconnect the assistant coil circuit when it arrives in the given position; the centrifugal actuator, it must be 2 pieces at least or more, and opens outwards under the centrifugal force it produces when the above-said axis rotates; stretch spring, it will produce elastic resilience along the direction in which it converges the above-side centrifugal actuator, and a groove is formed inside of the sleeve, the groove contacts with the two sides of the above-said limitative units in the rotary direction. The invention will reduce maximally the wear and tear of the contacting position where it is produced by axis and centrifugal switch, and reduce the noise also.

The invention provides a speed regulating and stabilizing motor capable of controlling the rotate speed of the motor accurately and is mainly used for the stepless speed regulation and stabilization of ordinary DC motors and AC motors. The invention mainly comprises a centrifugal speed regulator which is fixed on a projecting shaft at the tail of the motor. When a motor shaft rotates, a centrifugal switch on the centrifugal speed regulator is driven to rotate at the same time by the gear coupling. When the rotate speed of the motor surpasses the presetting value, the centrifugal switch is off; otherwise, the centrifugal switch is on. The input current of the motor flows through an electric brush and the centrifugal switch is used to control the on and off time, thereby controlling the rotate speed of the motor. The rotate speed is regulated by the drive-by-wire or a servo-actuator to regulate the pressure of the centrifugal switch; if the pressure is great, the rotate speed is regulated to be high; if the pressure is small, the rotate speed is regulated to be slow. The application of a thyristor amplifying circuit to a large-sized motor ensures that the motor with high voltage and great current can be controlled even if the current flowing through the centrifugal switch and the voltage are small.

A centrifugal switch structure for single phase induction motor consisting of axial moveable axle collar slide block, moveable switch containing first leaf spring switch in shell for switching on / off main and sub windings, moveable lever rotary hinged in shell and located at first leaf spring switch and rotation according to pressurization state of axle collar, fixing slot for executing on / off action. Said invention can prevent the damage of contact by smelting contact.

The invention discloses a structure of centrifugal switch, including: a cylinder type hollow shaft with a motor shaft through, arranged with a flange and formed with guide arms; a shaft mechanism inserted in the back of the flange of the hollow shaft and moving in the axial direction of the hollow shaft and a slide block situated at the back end of the shaft mechanism and forming a shaft lining in the radial direction; the centrifugal brakes with the guide arms passing through the through hole, arranged the left and right sides of the shaft mechanism of the slide block in a hinging mode at the same time and able to turn, and opened under the action of centrifugal force; an extension spring linking two-side centrifugal brakes, making them approach to each other as they are not acted by the centrifugal force and providing return force; a buffer pad provided on the contact surface between the slide block and hollow shaft or on the shaft lining of the slide block. It uses the buffer pad to effectively reduce the produced noise as the brakes act and improve the reliance of the products.

Systems and methods for bypassing a centrifugal switch are disclosed. The systems may include a bypass relay operatively connected to the heating element and configured to bypass the centrifugal switch prior to the drum reversing rotational direction, and allow the heating element to remain energized during the drum reversing rotational direction. The centrifugal switch bypass circuit further includes a relay hold circuit operatively connected to the bypass relay and configured to cause the bypass relay to continue bypassing the centrifugal switch during the drum reversing rotational direction. The method may include, once the drum begins reversing the rotational direction, utilizing a bypass relay to bypassing the centrifugal switch. Finally, the method may include utilizing a relay hold circuit to cause the bypass relay to continue bypassing the centrifugal switch during reversal of the rotational direction.

The invention discloses a fan-type motor centrifugal switch which relates to the field of an electric appliance switch. The fan-type motor centrifugal switch is provided with a rotating shaft, wherein the rotating shaft is provided with a fan impeller; the upper side and the lower side of the front side surface of the fan impeller are provided with bidirectional spring seats; the spindle on the front side of the fan impeller is provided with a centrifugal counter weight snap-gauge; the centrifugal counter weight snap-gauge is clamped between the two spring seats; the left end part and the right end part of the centrifugal counter weight snap-gauge are hinged with centrifugal plates; the upper end part and the lower end part of each centrifugal plate are provided with elastic sheathing arms; the centrifugal plate and the centrifugal counter weight snap-gauge are hinged with the each other; each elastic sheathing arm is sheathed with a closed spring; the other end of the closed spring is abutted against the spring seats; the rear side of the fan impeller is provided with an insulation plate; and a return spring and a travel switch are arranged between the insulation plate and the travel switch. According to the fan-type motor centrifugal switch disclosed by the invention, each component can be made of ABS (acrylonitrile butadiene styrene) plastic products, and the production and the use of materials are both environment-friendly and free from pollution. The fan-type motor centrifugal switch has the advantages of small volume, light weight, cost saving, low structural requirement on a motor shaft, manpower saving, low cost, convenience in installing and maintaining and high effective use ratio of the inside of a motor body, and the improvement of power of the motor.

A terminal box, including at least a box (51) having a receiving part (10), a movable control rod (7), multiple electric contacts (8), a thermostat (9) having a terminal (91), and a wiring mechanism (12). The movable control rod (7) is disposed on the box (51) and partially extends therefrom. The electric contacts (8) are disposed in the box (51). The thermostat (9) is disposed on end surface of the box (51). The receiving part (10) operates to receive the thermostat (9). One end of the electric contact (8) extends from the box (51) and forms a connecting part (81). A separating plate (11) is disposed between the connecting part (81) and the thermostat (9). One end of the wiring mechanism (12) is connected to the connecting part (81), and the other end thereof bypasses the outside of the separating plate (11) and is connected to the terminal (91). If the thermostat experiences temperature detection failure, users of the motor can easily remove the wiring mechanism, and timely switch off the power supply connected to the motor via an external protection circuit thereby preventing the motor from being burned out.