235 results about "Resolver" patented technology

The present invention relates to a reluctance resolver (100) with an at least partially soft magnetic stator (104) and an at least partially soft magnetic rotor (102) which oppose each other by forming an air gap. The magnetic resistance in the air gap changes periodically on account of a configuration of the rotor that varies over the circumference. The angle sensor has a magnetic flux transmitter which is arranged on the stator and generates a predefined magnetic flux distribution in the air gap via at least one pair of poles. Furthermore, a magnetic flux receiver, which measures the intensity of the magnetic field via at least two pairs of signal poles arranged offset from one another at an angle, is arranged on the stator, wherein an angle value for a position of the rotor in relation to the stator can be derived from the two receiver signals. According to the invention, the stator (104) has distributed over the circumference a large number of teeth (110) which are separated from one another by grooves, and the magnetic flux transmitter comprises at least two primary windings which are arranged in such a way that at least one of the teeth carries no primary windings.

An active power distribution network asymmetric operation optimization method based on an intelligent soft open point includes the following steps: inputting a structure and parameters of a power distribution system; establishing an active power distribution network asymmetric operation optimization model based on an intelligent soft open point on the basis of the structure and parameters of the power distribution system and also on the basis of consideration of system loss, system voltage imbalance and current imbalance at an outlet side of a power distribution transformer; conducting linearization and convex relaxation on non-linear constrained conditions in the active power distribution network asymmetric operation optimization model based on the intelligent soft open point according to a semidefinite programming standard form, and converting the model into a semidefinite programming model; solving the obtained semidefinite programming model through a mathematic resolver solving semidefinite programming; and outputting a solving result, and verifying accuracy of semidefinite relaxtion. Active power distribution network asymmetric operation optimization problems based on the intelligent soft open point can be described in a unified manner. Model solving difficulties are reduced, the calculating speed is greatly improved, and an optimal system operation scheme can be obtained quickly.

An angle position detection apparatus according to the present invention includes: a unipolar resolver and a multipolar resolver installed so that reluctance is changed in synchronization with the revolution of a direct motor drive; and a select switch is used to switch between paths along which an excitation signal from a transmitter is supplied to these resolvers. When the supply path for the excitation signal is changed by the select switch, at the least, the unipolar resolver and the multipolar resolver are not excited at the same time, so that magnetic flux leaking from one resolver does not electrically interfere with the other resolver. Therefore, the unipolar resolver and the multipolar resolver 30 can be arranged so they are near each other, and the size and the thickness of the angle detection apparatus can be reduced.

The invention relates to a self-adaptive ultrasonic motor based on temperature tracking. In the prior art, when the ultrasonic motor works in a wide temperature range from -55 DEG C to 85 DEG C, the amplitude frequency curve of a stator translates to right or left, thus the output torque and the rotation speed of the motor are obviously reduced. The self-adaptive ultrasonic motor provided by the invention comprises the ultrasonic motor with a temperature sensing structure and a motor driving controller with a motor leading out mechanism and temperature measurement and control units. A motor closed-loop control sensing system which is composed of a temperature sensor and a photoelectric encoder, a resolver or a potentiometer is added in the motor structure. Self-adaptive adjustment of the motor frequency is carried out through the driving controller, so that the motor always works at the best frequency point, and stable rotation speed and torque output are realized. According to the invention, many characteristics of the existing ultrasonic motor are retained; the work environment adaptability is greatly enhanced; and the motor can normally work in the temperature range from -55 DEG C to 85 DEG C.

Disclosed is a rotor information estimation system including a resolver configured to measure a rotor location of a motor; a proportional-integral observer based on the motor and configured to estimate the rotor location of the motor; and an error calculator configured to calculate an error of the rotor location measured by the resolver using the rotor location estimated by the proportional-integral observer. The proportional-integral observer may estimate rotor information of the motor by performing an operation on the calculated error based on a characteristic of the motor.

An apparatus for measuring an error in a resolver includes a first calculator that perform an inverse Park transform based on voltages Uq and Ud at an output of PI current regulators, and delivers voltage setpoint signals PWM_A, PWM_B, PWM_C to a power stage via a line on which a DC voltage Ubus-dc is available. The power stage generates a three-phase system of voltages U_A, U_B, U_C for energizing an electric machine. The apparatus also includes a signal processor that provides an angle measurement α_m. Based on currents MesI_A, MesI_B, MesI_C of the three phases, and on a rotor angle α_r, a second calculator of the device delivers values MesId, MesIq used by the first calculator. A PI voltage regulator delivers an angle α_c for correcting the error by regulating a setpoint value for the voltage Ud.

The invention discloses a reconfigurable guiding logic device based on a multiple-wavelength single-waveguide multiple-ring cascade structure, which is particularly applicable to the future optical information processing field. The reconfigurable guiding logic device based on the multiple-wavelength single-waveguide multiple-ring cascade structure is formed by n logic device arithmetic elements and a straight waveguide, wherein each logic arithmetic element is formed by N micro-ring MRRs (Multiple Response Resolvers); each micro-ring MRR is coupled with a wire waveguide. According to the device provided by the invention, the natural characteristic of light is utilized, so that a large amount of information can be processed at high speed; meanwhile, the mature process technology is utilized, so that the device is high in integration level, small in size, low in power consumption, good in expansibility, and convenient to integrate with electric components, so as to be expected to play an important role in optical information processing.

The invention provides a resolver, a motor and a power steering device. A variable reluctance type resolver includes: a resolver stator portion, which is substantially ring-shaped centered on a central axis; and a resolver rotor portion, which is attached to the shaft of the rotor portion of a motor and set Inside the resolver stator section. When by using the maximum value (gmax) of the gap g between the rotor core and the resolver stator part at a predetermined point on the outer peripheral edge of the rotor core, the minimum value (gmin) of the gap g, defined by the predetermined point and the reference point When the size of the gap g is set by the angle θ, the shaft multiplier n and the coefficient, the resolver according to the present invention is operable to improve the accuracy of detecting the rotation angle.

An ECU performs control processing including setting an inverter to a gate blocking state when an abnormal condition of the inverter occurs, activating a converter, driving an engine, carrying out first suppression control when an abnormal condition of a resolver occurs and when an MG2 rotation speed immediately before occurrence of the abnormal condition is equal to or smaller than a first speed threshold value, and carrying out second suppression control when the MG2 rotation speed immediately before occurrence of the abnormal condition is greater than the first speed threshold value and when there is no record of stop.

The present application discloses a method for resolving harmonic ambiguity and inter-array harmonic tracking. The method allows derivation of a complete set of possible harmonic families given the selection (by an operator) or automatic detection (by an automated algorithm) of a single tone (f_selected) from a frequency spectrum using a novel “ambiguity matrix” approach in which a matrix of all N possible harmonic members and M hypothetical fundamentals is constructed. The ambiguity matrix provides an image of all possible harmonic families associated with a selected tone. The selection of the correct fundamental is then made based on simple comparisons between this image and the set of all possible fundamentals. The ambiguity matrix effectively provides a reduced finite solution space (discrete set of possibilities) in which to unambiguously estimate the correct fundamental.

The invention discloses a six-degree-of-freedom absolute pose measuring device based on quasi-zero stiffness. The six-degree-of-freedom absolute pose measuring device comprises a reference platform, ato-be-measured platform, a pose resolver and six quasi-zero stiffness supporting legs of the same structure. Currents in opposite directions are respectively supplied to a lower end coil and an upperend coil, at the moment, two coils generate an electromagnetic field in the surrounding space, the electromagnetic field interacts with the magnetic fields of the lower magnet and the upper magnet togenerate electromagnetic rigidity opposite to rigidity of the spring, and the rigidity of the spring and the electromagnetic negative rigidity are mutually counteracted, so the rigidity of the wholesupporting leg is close to zero rigidity; when the to-be-tested platform moves in the space, the motion cannot be transmitted to the reference platform, so the reference platform is in a static state;at the moment, deformation of the six supporting legs can be measured through the laser displacement sensors, six sets of deformation are input into an pose resolver, and the displacement and attitude of the to-be-measured platform can be solved through kinematics positive solution of the six-degree-of-freedom device.

In described examples, an angular resolver system includes an imbalance detector (1600) for detecting degraded resolver output signals. The imbalance detector (1600) includes first (1602) and second (1604) power averaging circuits and a comparator circuit (1662, 1664, 1670). The first power averaging circuit (1602) includes a first integrator (1646) for generating over a first time window a firstaverage power signal (Vcl) in response to resolver sensor output signals. The second power averaging circuit (1604) includes a second integrator (1648) for generating over a second time window a second average power signal (Vc2) in response to the resolver sensor output signals, where the first time window is longer than the second time window. The comparator circuit (1662, 1664, 1670) compares the first average power signal and the second average power signal and generates a fault signal (1670) when the first average power signal and the second average power signal differ by a selected voltage threshold (1654, 1658).

The invention relates to the technical field of electric vehicle fault protection, in particular to a high-speed protection method for an electric vehicle resolver fault. The method comprises the steps that motor rotating speed information is stored in real time, when a resolver fault occurs, the historical rotating speed of a t-a time point is calculated through the stored motor rotating speed information, t is the time point when the resolver fault occurs, and a is a set time length; the historical rotating speed is compared with a high rotating speed protection threshold value, and if the historical rotating speed is smaller than the high rotating speed protection threshold value, PWM waves are closed; and if the historical rotating speed is not less than the high rotating speed protection threshold, three-phase short-circuit protection processing is performed. After a resolver fault occurs during high-speed operation of the motor, a motor control system can be effectively and reliably protected, the MCU can accurately estimate the rotating speed of the motor during high-speed operation, and then corresponding protection measures are executed according to the current rotating speed information.

The present invention relates to an electromagnetic coil structure for being mounted on a magnetic core. Such a magnetic core is for instance a part of a rotating electric machine or of a magneto electronic angle sensor. The present invention further relates to a belonging magnetic core and to a magneto electronic angle sensor, in particular a reluctance resolver. Furthermore, the present invention relates to a method for fabricating such an angle sensor. The coil structure (106) comprises at least one electrically conductive winding formed as a flat conductive track (110), and at least one flexible electrically insulating carrier (112) for carrying said winding. Said coil structure has at least one opening (108) for receiving a magnetic flux guiding element (104) of said core. The circumferential surface of the core whereto said electromagnetic coil structure (106) is mounted has a polygonal shape.

A resolver stator includes an annular first cover portion, an annular second cover portion, and a plurality of pillars. The first and second cover portions cover coils from both axial sides. The pillars couple the first and second cover portions, and are arranged between the adjacent teeth. Each pillar has circumferential side faces each of which has a radially inner end portion that is arranged with a labyrinth clearance left between the radially inner end portion and a radially inner end portion of the tooth next to the side face, and each of which is a concave curved surface so as to be further apart from the tooth from the radially inner end portion toward a radially outer end portion of the side face.

The invention discloses a phase angle calibration method and device for a dual-motor hybrid power system and a vehicle, and the method comprises the steps: obtaining calibration correlation signals of a driving motor and a starting power generation motor, and the calibration correlation signals comprise signals sent by a control module and a diagnostic tool; judging whether the calibration correlation signal meets a preset calibration condition or not by utilizing the vehicle control unit; if the calibration correlation signal meets a driving motor calibration condition, enabling the driving motor controller to control the driving motor to operate, calibrate a resolver zero phase angle of the driving motor, and determine a first initial phase angle of the driving motor; and if the calibration correlation signal meets the calibration condition of the starting power generation motor, enabling the starting power generation motor controller to calibrate a rotary zero phase angle of the starting power generation motor, and determine a second initial phase angle of the starting power generation motor. The diagnostic tool and the control module are used for controlling the two power sources to operate, the phase angles of the double motors are calibrated on a real vehicle, and the calibration efficiency and accuracy can be improved.

A method and a system for compensating an offset of a resolver, may include sampling an output signal of the resolver at a predetermined sampling frequency, comparing magnitudes of the sampled output signals of the resolver, when a difference in magnitude between the sampled output signals of the resolver is greater than a predetermined reference value, controlling the motor by a random pulse width modulation (RPWM) scheme in which switching frequencies of the switching elements in the inverter are arbitrarily changed, and compensating an offset of the resolver coupled to the motor while controlling the motor with the RPWM scheme.