Abstract: A magnetic ring encoding device for composite signals, which is disposed at an end of a rotary shaft of a rotary motor. The magnetic ring encoding device includes: a magnetic ring having a ring-shaped body section synchronously rotatable with the rotary shaft of the rotary motor, multiple magnetic poles being arranged on the body section at equal intervals; multiple Hall elements located and arranged around the body section at intervals, the Hall elements serving to sense magnetic field change that takes place when the magnetic poles pass through the Hall elements and output sensed signals according to the magnetic field change; and an adder for performing addition operation for the sensed signals output from the Hall elements.

Abstract: A drive with heat dissipation and energy-saving function for supplying power to drive a motor. The drive includes a driving circuit having a rectification section. The rectification section serves to receive AC current generated when the motor abruptly accelerates/decelerates and convert the AC current into DC current and output the DC current. The drive further includes a cooling module electrically connected to an output end of the rectification section. The cooling module is drivable by the DC current output from the rectification section to conduct out and dissipate heat.

Abstract: A DC motor with a rotation direction switching circuit comprises a second power semiconductor assembly and a first power semiconductor assembly which are switched on and off alternatively by changing the polarity of the DC power source, thus providing an electronic rotation direction switching method. The service life is prolonged and the replacement times relatively reduce, and as a result, the material cost and maintenance cost of the rotation direction switching circuit is reduced. Therefore, it can improve the willingness of the user to use the DC motor with the rotation direction switching circuit and relatively improve the economic value of the DC motor.

Abstract: A position sensing feedback wireless transmission system comprises: a movable carrier, a sensing head, a scale and a display or a controller. When the present position of the movable carrier is required to know, the sensing head can be utilized to transmit the measured information data back to the display or the controller in wireless manner. Since the position sensing feedback wireless transmission system of the present invention adopts the wireless technology, in addition to save the connecting wires cost, it can be relatively simply used in the machine. Consequently, for the design of the mechanism required to measure the long distance, the unit with a plurality of running wires can be dispensed with.

Abstract: The present invention provides an integrated linear motor, which comprises a linear stage and a controller coupled to the linear stage, wherein the linear stage comprises a Hall sensor, an encoder, and a linear motor integrated thereon and the controller comprises a microprocessor, an amplifier, and a power supply integrated therein.

Abstract: A device for controlling inductive load comprises at least: a power source, a first control assembly, a second control assembly and an inductive load. The first control assembly is connected in series to the power source, and comprises: a relay switch, a relay and a MOSFET, the relay switch is connected to a normal close contact and a normal open contact selectively. The normal open contact is electrically connected to the MOSFET, the normal close contact is connected to a drain terminal of the MOSFET, and a source terminal of the MOSFET is connected to the power source. The second control assembly is structurally similar to the first control assembly. The inductive load is disposed between the normal close contact of the relay switch and the normal close contact of the relay switch.

Abstract: A device for controlling inductive load comprises at least: a power source, a first control assembly, a second control assembly and an inductive load. The first control assembly is connected in series to the power source, and comprises: a relay switch, a relay and a MOSFET, the relay switch is connected to a normal close contact and a normal open contact selectively. The normal open contact is electrically connected to the MOSFET, the normal close contact is connected to a drain terminal of the MOSFET, and a source terminal of the MOSFET is connected to the power source. The second control assembly is structurally similar to the first control assembly. The inductive load is disposed between the normal close contact of the relay switch and the normal close contact of the relay switch.

Abstract: A linear actuator includes a casing and a retractable member driven by a motor is movably received in the casing and a contact member is connected to the retractable member. A first position switch connected to the motor, a plurality of travel switches and a final position switch connected with a diode are connected to the actuator. These switches are connected in series by normal-close switches. Normal-open switches of the travel switches located between the first position switch and the final position switch are connected to a circuit of the control device. The motor is stopped when the final position switch touches the contact member of the retractable member, the motor is activated, when a current is applied to the diode again.

Abstract: A linear actuator includes a casing and a retractable member driven by a motor is movably received in the casing and a contact member is connected to the retractable member. A first position switch connected to the motor, a plurality of travel switches and a final position switch connected with a diode are connected to the actuator. These switches are connected in series by normal-close switches. Normal-open switches of the travel switches located between the first position switch and the final position switch are connected to a circuit of the control device. The motor is stopped when the final position switch touches the contact member of the retractable member, the motor is activated when a reverse electromotive is applied to the diode.

Abstract: A controlling device for a DC motor speed variation including a power supply circuit, a pair of relays and an interlock circuit for alleviating shock arising from the initiation and termination of a DC motor operation. The controlling device protects the DC motor from catastrophic failure through a sudden variation of the armature current. The controlling device interlocks the direction of the motor rotation while simultaneously providing over current protection for the DC motor.