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9035594 Boost converter control apparatus  
A boost converter control apparatus for controlling a motor drive system which is provided with a boost converter disposed between an electric power converter and a direct current power supply,...
8994313 Injection molding machine  
An injection molding machine includes a motor; a driver circuit; a rectifying part; a capacitor provided between the driver circuit and the rectifying part; a bridge circuit that converts direct...
8994314 Injection molding machine  
An injection molding machine according to the invention includes a motor, a driver circuit that drives the motor; and a rectifying part that supplies electric power to the driver circuit. A...
8922151 Regenerative medium voltage inverter  
Provided is a regenerative medium voltage inverter, the inverter being such that regenerative operation is enabled by changing structure of input terminal of a unit power cell at a series H-bridge...
8884573 Control techniques for motor driven systems  
A drive signal for a motor-driven mechanical system has zero (or near zero) energy at an expected resonant frequency of the mechanical system. These techniques not only generate a drive signal...
8878471 Control apparatus for electric rotary machine  
In a control apparatus for an AC electric motor, a dq axis current feedback control unit 44 and a qn axis current feedback control unit 46 execute a feedback control of higher harmonic components...
8841873 Motor control device for vehicle  
The motor control device includes: a vehicle control device (1) for generating a first torque command value Tref according to state quantities of the vehicle acquired from various sensors (7); a...
8816629 Vibration control robot system  
A vibration control robot system of the present invention includes: a robot controller (101) transmitting an operation command value and receiving an output value of a pulse encoder of the servo...
8810176 Converter control device for vehicle  
A boost control section for controlling a converter includes a PI control section and a resonance suppression section. The PI control section calculates a basic command value based on a deviation...
8754602 Motor controller with drive-signal conditioning  
An embodiment of a motor controller includes a motor driver and a signal conditioner. The motor driver is configured to generate a motor-coil drive signal having a first component at a first...
8704478 Motor drive circuit  
A motor-drive circuit includes: a filter circuit to attenuate a frequency band including a resonance frequency of an actuator in a target-current signal, which is a digital signal indicating a...
8560171 Damping force controller  
The damping force of a damping force generation apparatus is controlled by operating an actuator on the basis of a control input u calculated by a state feedback controller K designed such that an...
8525467 Phase delayed active motor damping to mitigate electric vehicle driveline oscillations  
An active motor damping system and method for dampening oscillations of a driveline in a vehicle includes generating a commanded torque indicative of an actual torque which would counteract the...
8504239 Damping apparatus for reducing vibration of automobile body  
A damping apparatus for an automobile is provided, capable of ensuring a high level of reliability while obtaining excellent damping effect with simple configuration. The damping apparatus for an...
8400097 Pulse period measurement method  
The effect of chattering on the measurement of the pulse period is reduced. The pulse period representing the rise interval of target pulses appearing in a pulse signal PI is measured. The pulse...
8299744 Control techniques for motor driven systems  
Embodiments of the present invention provide a drive signal for a motor-driven mechanical system whose frequency distribution has zero (or near zero) energy at the expected resonant frequency of...
8248008 Motor control device, image forming apparatus, and motor control method  
A motor control device includes a measurement unit, a speed control unit, a correction unit, a drive unit, and a disturbance suppressing unit. During a time period before a measurement value of...
8228017 Control techniques for motor driven systems  
A drive signal for a motor-driven mechanical system has zero (or near zero) energy at an expected resonant frequency of the mechanical system. The drive signal may be provided in a series of steps...
8222784 Electric machine with single stator and two mutually independent rotors, and road vehicle provided with said electric machine  
An electric machine provided with: a stator, equipped with a single stator winding; at least two shafts, which are independent of one another and are mounted so that they can turn; at least two...
8222852 Motor control device and image forming system  
A motor control device of the present invention includes a correction input unit, a measurement unit, a first signal processing unit, and a second signal processing unit. The correction input unit...
8198851 Motor controller  
A motor controller capable of detecting an oscillation of a feedback loop and performing gain adjustment while updating a gain value of a control unit is provided. The motor controller includes an...
8193756 Variable speed drive for permanent magnet motor  
A drive system for a compressor of a chiller system includes a variable speed drive. The variable speed drive is arranged to receive an input AC voltage at a fixed AC input voltage and provide an...
8102137 Method of detecting a useful signal  
A method of detecting a useful signal from a measurement signal that is overlaid by at least one interference signal for use in a control or regulating device, where the interference signal occurs...
8030874 Power converting apparatus  
To reduce, in a power converting apparatus for an electric locomotive, a sixth-order harmonic noise induced by a torque ripple component equivalent to a sixth-order frequency of an inverter...
8018193 Torque ripple mitigation controller with vibration sensor delay compensation  
An enhanced torque ripple mitigation algorithm for permanent magnet synchronous machines (PMSMs), the algorithm including compensation for sensor delay.
7915842 Actuator drive control device  
An active vibration isolation support system includes an electronic control unit which supplies a target electric current to an actuator to periodically drive the actuator in an expansion and...
7876063 Axial gap type motor/generator  
An axial gap type motor/generator is provided with a stator, a rotor and an alternating current control device. The alternating current control device executes alternating current control of a...
7868577 Electric motor control apparatus  
In order to simultaneously realize an improvement in disturbance suppression force of an electric motor control apparatus and vibration suppression of a load machine, a velocity control circuit...
7786691 Bus disturbance regulator  
Presented is a harmonic regulator that regulates a plurality of individual harmonics in a system having periodic torque disturbances to commanded values, including zero. For each harmonic being...
7746020 Common mode & differential mode filter for variable speed drive  
Systems and methods for improved Variable Speed Drives having active inverters include an input filter for filtering common mode and differential mode currents. A three-phase inductor has three...
7733051 Model-based active electronic damping for stepper motors  
A method for damping vibrations in a stepper motor with micro-stepping control which comprises the steps of identifying the force amplitudes and phase shifts of multiple harmonic detent torques of...
7659683 Resonant frequency identification  
Systems and methods that determine resonant frequencies of a motor system via employing an output of a velocity regulator. The velocity regulator enables the motor drive to command the rotation of...
7659684 Method and system for operating a motor to avoid selected pulse ratio values  
A method and system for operating a motor are provided. Power is provided to the motor through at least one switch operating at a first switching frequency. A pulse ratio of the motor is...
7629764 Nonlinear motor control techniques  
The present invention provides a torque loop control method for servomotors utilizing discontinuous pulse width modulation that incorporates measuring the power factor in real time. Also included...
7612511 Load drive apparatus  
A load drive apparatus includes a noise filter, which includes a coil connected in series between a power source and a load, and a switching transistor connected in parallel across the coil, and a...
7545113 Harmonic disturbance regulator  
Presented is a harmonic regulator that regulates a plurality of individual harmonics in a system having periodic torque disturbances to commanded values, including zero. For each harmonic being...
7518331 AC rotating electric machine control method and electrical power train system  
Solving Means: A field coil current and a stator current are controlled by a controller. The stator current is controlled under vector control and is controlled so that the phase keeps an...
7501784 Compensation method and apparatus for preventing damaging bearing currents in an electrical machine  
In an apparatus to increase the service life of bearings in an electric machine, the bearing currents that act on the bearings of the rotor are reduced by the application of a corresponding...
7453224 Sensing mechanical transitions from current of motor driving hydraulic pump or other mechanism  
A circuit and method for detecting an operating transition of a mechanical apparatus driven by a hydraulic prime mover comprising a hydraulic pump driven by an electric motor, the operating...
7397216 Circuit for monitoring harmonic distortion in the power supply of a synchronous electrical machine with permanent magnet excitation  
The present invention provides a circuit for monitoring harmonic distortion in the power supply of a synchronous electrical machine with permanent magnet excitation that comprises a rotor without...
7345446 Method of controlling movable member driven by electric motor  
Method of controlling a movable member driven by an electric motor by monitoring current circulating through the electric current and ripples therein. The method including detecting current peaks...
7342372 Method for power control of an electric motor  
The invention relates to a method for power control of an electric motor, in particular a motor for driving the suction fan of a vacuum cleaner connected to an AC mains power supply. The power...
7271557 AC motor driving apparatus and method of controlling the same  
The AC motor driving apparatus comprises an inverter for supplying power to an AC motor, current sensors for detecting current that flows in the motor or inverter, a rotation sensor for detecting...
7265511 Motor control device  
A speed controller includes a speed integration compensation low-pass filter, an integral control system, a proportional control system, and a multiplication device means. The speed integration...
7248014 Motor control system  
A motor control system capable of securing stability and rapidity of motion even in a machine where the stability varies in accordance with a position of a driven member. The driven member and a...
7208901 Control method for jerk-limited speed control of a movable machine element of a numerically controlled industrial processing machine  
A control method for controlling a speed of a movable machine element of a numerically controlled industrial processing machine with jerk limitation is described. The processing machine can be,...
7208903 Control device for alternating-current motor  
In one coordinate system of arbitrary rectangular coordinate systems including a coordinate system in which the position of a stator is fixed, a coordinate system in which the position of a rotor...
7190144 System and method for adjusting a PID controller in a limited rotation motor system  
An adjustment system is disclosed for adjusting a proportional, integral, derivative controller in a limited rotation motor system. The adjustment system includes a first transform unit, a second...
7183738 Motor control device  
A speed control means 7 for outputting a drive command signal for a motor 1 to make the speed of the motor 1 conform to the speed command signal based on a signal indicating the difference between...
7170247 Method of control of magnetic sound of alternating current rotating machine  
A method for greatly reducing magnetic sound of an alternating current rotating machine compared with the past comprising superimposing an n−1-th order frequency in inverse turn on a multi-phase...
Matches 1 - 50 out of 254 1 2 3 4 5 6 >