Patents Assigned to Nippon Pulse Motor Co., Ltd.
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Publication number: 20240283306Abstract: A constant force generator includes a case of a tube-shaped ferromagnetic material and extending in an axial direction, a tube-shaped stator disposed in the case, and a rod-shaped shaft disposed in the tube-shaped stator via a gap. The tube-shaped stator includes N main permanent magnets magnetized in a radial direction and disposed adjacently at regular angular intervals of (360/N) degrees, and an even number of secondary permanent magnets magnetized in a circumferential direction and sandwiching each of the N main permanent magnets on both sides in the circumferential direction. The secondary permanent magnets sandwich the both sides of each main permanent magnet so that magnetic poles of the secondary permanent magnets, facing the both sides of the sandwiched main permanent magnet, have a polarity the same as an inside magnetic pole of the sandwiched main permanent magnet. The rod-shaped shaft at least includes a shaft portion of a magnetic material.Type: ApplicationFiled: October 4, 2023Publication date: August 22, 2024Applicant: Nippon Pulse Motor Co., Ltd.Inventor: KOJI SAYAMA
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Patent number: 12003159Abstract: A multi-axis linear motor actuator has a circuit board having a size covering coil portions in linear shaft motors arranged in a row, and combined with the linear shaft motors to be adjacent thereto and parallel to its arrangement direction; and magnetic shielding plates, longer than the coil portions, arranged and fixed along an axial direction at positions corresponding to positions between adjacent coil portions. Hall sensors are installed in the circuit board in each region corresponding to each linear shaft motor at intervals in a moving direction of a shaft of each linear shaft motor. Each magnetic shielding plate has a wide portion with a width greater than a diameter of the coil portion at a part corresponding to the region where the Hall sensors are installed. The circuit board has first slits for inserting the wide portions. The Hall sensors are installed adjacent to the wide portion.Type: GrantFiled: February 5, 2021Date of Patent: June 4, 2024Assignee: NIPPON PULSE MOTOR CO., LTD.Inventors: Kensuke Sakuma, Tetsuo Ishiwari
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Publication number: 20230155469Abstract: A multi-axis linear motor actuator has a circuit board having a size covering coil portions in linear shaft motors arranged in a row, and combined with the linear shaft motors to be adjacent thereto and parallel to its arrangement direction; and magnetic shielding plates, longer than the coil portions, arranged and fixed along an axial direction at positions corresponding to positions between adjacent coil portions. Hall sensors are installed in the circuit board in each region corresponding to each linear shaft motor at intervals in a moving direction of a shaft of each linear shaft motor. Each magnetic shielding plate has a wide portion with a width greater than a diameter of the coil portion at a part corresponding to the region where the Hall sensors are installed. The circuit board has first slits for inserting the wide portions. The Hall sensors are installed adjacent to the wide portion.Type: ApplicationFiled: February 5, 2021Publication date: May 18, 2023Applicant: NIPPON PULSE MOTOR CO., LTD.Inventors: Kensuke SAKUMA, Tetsuo ISHIWARI
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Publication number: 20230143311Abstract: Provided is a method for manufacturing a coil unit that is suited to the bulk manufacturing of multiple sets of coil parts for a multi-axis linear motor actuator. This method of manufacturing a coil unit for a multi-axis linear motor actuator, which is constituted by disposing multiple sets of linear shaft motors 10 in a line at a prescribed pitch, includes: a step in which a coil fixing member 50 is prepared that holds receiving parts 51 that are capable of receiving multiple coil parts 15, which are equal in quantity to the multiple sets of linear shaft motors, with the coil parts being arranged in a line at the prescribed pitch; a step in which the multiple coil parts are disposed by being arranged in a line and secured to the coil fixing member; and a step in which electromagnetic shielding plates 70 that are longer than the coil parts are disposed along a center axis direction at locations corresponding to the spaces between at least adjacent coil parts among the multiple coil parts disposed in the line.Type: ApplicationFiled: February 5, 2021Publication date: May 11, 2023Applicants: NIPPON PULSE MOTOR CO., LTD., GMC HILLSTONE CO., LTD.Inventors: Kensuke SAKUMA, Tetsuo ISHIWARI, Michiru ABE, Shota INOUE
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Stepping motor provided with a drive control integrated circuit having a prestored operating pattern
Patent number: 5977739Abstract: A drive control integrated circuit for controlling a motor, such as a stepping motor, a servo motor, or the like, which is operated by pulse signals, comprising: a memory circuit which stores parameters determining an operating pattern of said motor; a pulse generation circuit for generating said pulse signals for driving said motor based on the parameters stored in said memory circuit; a frequency variation circuit for continuously varying a frequency of said pulse signals of said pulse generation circuit based on said parameters stored in said memory circuit; a preset down counter circuit for controlling the number of pulses outputted from said pulse generation circuit based on said parameters stored in said memory circuit; a data selector circuit for selecting said parameters stored in said memory circuit; and a control circuit for monitoring the operational state of said motor for controlling the output of said pulse signals based on operational commands.Type: GrantFiled: December 22, 1997Date of Patent: November 2, 1999Assignee: Nippon Pulse Motor Co., Ltd.Inventor: Masayuki Ohsawa -
Patent number: 5424960Abstract: Characteristic parameters of a torque of a stepping motor and its associated driving current or voltage are measured in advance to providetorque vs. characteristic information data representative of the torque vs. driving current/voltage characterisitcs. Then, the above characteristic parameters are measured again when a real load is applied to a stepping motor as installed with associated mechanical coupling components. An actual load torque is determined by referencing the subsequently measured characteristic parameters to the previously obtained torque vs. characteristic information data. A load inertia moment can be determined by subtracting the motor's rotor inertia moment from a determined inertia moment of the entire system. Efficiency of the motor can be determined by multiplying the output of the measured load torque by the nuber of revolutions per second thereof and dividing this by the power supplied to the motor or driving circuit.Type: GrantFiled: September 23, 1992Date of Patent: June 13, 1995Assignees: NF. T&M. Systems. Inc., Nippon Pulse Motor Co., Ltd.Inventors: Asao Watanabe, Shuji Satoh