86results about "Linear DC motor control" patented technology

A sensorless method of detecting piston collisions in a reciprocating free piston linear compressor driven by an electronically commutated linear motor having at least one excitation winding is provided. A free piston gas compressor is also provided.

A long journey big thrust permasyn brushless beeline direct electromotor that includes stator part, rotor part and position and speed controlling system of the electromotor. The stator part composes permanent-magnet (3) and magnetic yoke (2), magnetizer (5) is connected with rack (1) via coattail groove structure, and two windings (4) with different direction current circle the magnetizer to form rotor part. The invention adopts the two-sized stator structure to eliminate the single sized magnetic pull, and the thrust is big, journey is long, the weight of rotor is light, without contact running and cost is low, it is fit for common numerical control machine tool feeding system, special numerical control machine tool feeding system which adopts gas floating or magnet floating guiding track and other high speed and high acceleration direct feeding systems.

The invention discloses a method for driving a motor of a mobile phone and mobile equipment. The method comprises the following steps of: firstly, generating a specific audio data file according to a set frequency; secondly, supplying the specific audio data file to an audio chip for digital-to-analogue conversion when a linear motor in the mobile phone needs to be driven to vibrate; and finally,sending an analog signal generated by conversion to the linear motor via the audio chip so as to drive the linear motor to vibrate. The method drives the linear motor to vibrate via the analog signalproduced by the audio chip in the mobile phone, so driving control on the linear motor can be realized without adding a special driving chip or a peripheral circuit. The method not only realizes low-cost design of a hardware circuit, but also achieves an excellent control effect on the linear motor on the basis of not affecting normal audio play, so the overall performance of a mobile phone product is improved.

Disclosed is a method of driving a servo motor with a built-in drive circuit in which a common rectifying circuit is provided on a distribution board to which a plurality of the servo motors with built-in drive circuits are connected, to thereby achieve a reduction in size of each servo motor. In this method, there is used a common distribution board for distributing power to be supplied to a plurality of servo motors with built-in drive circuits and for distributing a communication line, an external communication signal and external input power are supplied through the distribution board.

The invention provides a linear motor driver which comprises a current feedback loop module, a power module, a detecting module, and a state analysis and control module. The motor driver is characterized in that the current feedback loop module comprises a preposing input stage module, an adder module, a low pass filter module, a power amplification feedback module, a loading module, a current sampling amplification module and a gain adjustment module which are connected in sequence; and the output signal of the gain adjustment module is connected on the input end of the adder module finally, thus forming a loop. The linear motor driver has the characteristics of high linearity, wide bandwidth, good stability, small interference to outside, and strong capacity of resisting disturbance, and is small in volume and low in cost. As the temperature coefficient of the drain-source resistance of the power amplifier is positive, when the temperature of the power amplifier rises, the current is limited, therefore, no thermal breakdown occurs, and consequently, no secondary breakdown occurs.

The embodiment of the invention discloses a vibration control method of a linear motor. The method comprises the steps of: predicting the maximum displacement of vibration of a linear motor under thedrive of a second vibration waveform according to target parameters within the first duration when the vibration of the linear motor is controlled based on a first vibration waveform and prior to thecontrol of the vibration of the linear motor based on the second vibration waveform; in a condition that the maximum displacement is larger than a preset displacement, processing the second vibrationwaveform; and controlling the vibration of the linear motor based on the processed second vibration waveform to allow the displacement of the vibration of the linear motor to be smaller than or equalto the preset displacement, wherein the target parameters comprise the accelerated speed and the speed of the linear motor. According to the embodiment of the invention, the noise generated by the collision of the mass block of the linear motor and the shell of the linear motor due to overlarge displacement can be avoided, and the user experience is improved.

The present application provides a motor control method, device, electronic device and storage medium, belonging to the field of electronic technology. The method comprises the following steps: acquiring a current first falling state of the mobile device; Acquiring a current driving frequency of a motor in the mobile device if the first falling state of the mobile device satisfies a preset condition; Determining each candidate driving frequency corresponding to the motor according to the current driving frequency and the preset error range; Sequentially driving the motors at each candidate driving frequency to obtain acceleration values of the mobile device at each candidate driving frequency; A target drive frequency of that motor is determine based on the acceleration value of the mobiledevice at each candidate drive frequency. Thus, the motor control method realizes the automatic calibration of the driving frequency of the motor when the driving frequency of the motor and the resonant frequency do not match, ensures the consistency of the motor vibration quantity, improves the vibration feedback effect of the mobile device, and improves the user experience.

The invention discloses a method for controlling the vibration of a linear motor for solving the problem of difficult control of the vibration of the linear motor in the prior art. The method comprises: monophonic audio data are generated; a main processing chip transmits the monophonic audio data to an audio coding and decoding chip; the audio coding and decoding chip converts the monophonic audio data into an analog signal and sends the analog signal to the linear motor to control the linear motor to vibrate according to the analog signal; a processing interruption program in the main processing chip acquires the value of a pressure at a screen touch point and adjusts the output gain of the audio coding and decoding chip according to the obtained value of the pressure; and the linear motor adjusts the vibration intensity according to the gain. According to the technical scheme of the invention, the vibration of the linear motor can be realized without improving the traditional mobile terminal and the control difficulties of the vibration of the linear motor are reduced.

The invention discloses a linear servo system mechanical resonance control method which belongs to the field of mechanical equipment control. According to a control method in the prior art, on-line automatic adjustment of control parameters of a notch filter cannot be realized; a mechanical resonance suppression effect is poor; and the system requirements of high speed and high precision linear servo cannot be met. The invention provides a secant-based iterative learning algorithm to optimize the control parameters of the notch filter to solve the problem of resonance suppression of a linear servo system. The control method provided by the invention is simple, practical and highly precise.

A position sensor mounted in an actuator includes a magnetic detecting element for detecting the position of a shaft, and a temperature detecting element for detecting intra-sensor temperature which is used for correction of the temperature characteristics of the magnetic detecting element, the magnetic detecting element and the temperature detecting element being built therein. A control device for the actuator acquires both the temperature-corrected position of the shaft and the intra-sensor temperature from the position sensor, and uses them for control of the actuator.

The invention discloses a micro-macro two-stage driver and a control method thereof, and belongs to the technical field of precision positioning. The micro-macro two-stage driver comprises an outer casing, a second coil skeleton, an output rod, an end cover, a pre-tightening screw and a wiring terminal, wherein a permanent magnet cylinder is arranged in the outer casing to provide a radial magnetic field; a first coil skeleton is arranged in the permanent magnet cylinder, and is used for winding a first coil; a second coil skeleton is arranged in the first coil skeleton, and is used for winding a second coil; a giant magnetostictive telescopic rod is arranged in the second coil skeleton; the end cover is fixedly connected with the first coil skeleton through a bolt; an output hole is formed in the center of the end cover; the output rod penetrates through the output hole; the pre-tightening screw penetrates through the circular hole and is connected with a threaded hole by threads; both ends of the first coil are respectively connected with a first conducting wire and a second conducting wire. The micro-macro two-stage driver has the advantages that by adjusting the size of currentwhich is led into the first coil to control the macro-moving of the driver, and adjusting the size of current which is led into the second coil to control the micro-moving of the driver, the large-travel and high-accuracy drive effect can be realized.

The invention relates to the technical field of electronic equipment, in particular to a motor control method, a motor control device, a computer readable medium and a wireless communication terminal.The method comprises the following steps: in response to a control signal, acquiring current first attitude information of terminal equipment; determining a parameter interval corresponding to the first attitude information; and determining a corresponding first motor driving parameter according to the parameter interval, and controlling a motor controller to drive a motor to vibrate according tothe first motor driving parameter. According to the method, different motor driving parameters can be executed according to different attitudes of the terminal equipment, and self-adaptive control over the motor is achieved.

The present invention provides a method and device for controlling the n LLM coils (L1, . . . Ln) of an LLM stator making it possible to change the polarity of the coil voltage (UL1, . . . , ULn) of the n LLM coils (L1, . . . Ln) more easily and with little circuit complexity. It is proposed to apply a first operating potential (Ub1) to n first input terminals (A1, . . . , An) of n half bridges (HB1, . . . , HBn), and apply a second operating potential (Ub2) to n second input terminals (B1, . . . , Bn) of the n half bridges. For each half bridge (HB1, . . . HBn), a first switch (S11, . . . , S1n) is connected between a center point (C1, . . . , Cn) of the respective half bridge (HB1, . . . , HBn) and the first input terminal (A1, . . . , An), and a second switch (S21, . . . , S2n) is connected between the center point (C1, . . . , Cn) of the relevant half bridge (HB1, . . . , HBn) and the second input terminal (B1, . . . , Bn). The center point (C1, . . . , Cn) of the n half bridges is connected in each case to n first terminals (L11, . . . , L1n) of the n LLM coils (L1, . . . , Ln), and the second terminals (L11, . . . , L1n) of the n LLM coils (L1, . . . , Ln) are connected in a control point (C) that is regulated to a predetermined potential (Ux).

An electric motor control device includes a drive waveform generating unit configured to generate a drive waveform (a sine wave or a pseudo-trapezoidal wave) to an electric motor. A plurality of photo interrupters detect a rotational phase of an electric motor, and a information of rotational speed is detected by an encoder circuit based on a detected signal of the rotational phase of the electric motor. The control unit controls the drive waveform generating unit on the basis of detection information of the rotational phase of the electric motor and performs control so that a phase relationship between the rotational phase of the electric motor and the phase of the drive waveform is kept constant. Furthermore, the control unit sets an amplitude value of the drive waveform generated by the drive waveform generating unit in accordance with a difference between a target speed and the detected information of rotational speed and performs speed control so that a speed of the electric motor is kept constant. The control unit calculates an amplitude setting value with which correction for suppressing non-linearity is performed in a region in which an amplitude setting value of the drive waveform and actual work given to the electric motor is non-linear and controls the speed.

The objective of the present invention is to provide a compressor that is applied to a refrigerator without a cycle matching capability or a refrigerator without a control unit and can control the driving of a linear motor by itself, in order to solve the problems of conventional compressors; and a control method therefor. To this end, a compressor installed in an apparatus including a refrigerantcycle disclosed in the present specification comprises: a piston reciprocating in a cylinder; a linear motor for providing a driving force for the movement of the piston; a sensing unit for sensing amotor current of the linear motor; and a compressor control unit for detecting information related to a load of the apparatus, separately from a control unit for controlling a main body of the apparatus, wherein the compressor control unit calculates a phase difference between a stroke of the piston and the sensed motor current, compares the calculated phase difference with a reference phase difference value, and controls the driving of the linear motor in accordance with the detected load on the basis of the comparison result.

A control device for a linear motor includes a speed controller that calculates a current command value by an integration operation using a first integral value of a difference between a moving speed of a movable element provided in the linear motor and a speed command value calculated on the basis of a position command value, a current controller that applies a voltage to the linear motor on the basis of the current command value, and a correction value storage unit that stores the first integral value of the speed controller when the movable element remains at a position indicated by the position command value. When resuming control of the linear motor, the speed controller sets the first integral value stored in the correction value storage unit as an initial value for the integration operation before the brake controller turns off the brake device.

The invention provides a generation method of a control signal, a piece of electronic equipment and a storage medium. The method includes the following steps: acquiring a relation curve between initial signals and time, wherein the relation curve includes a number of sampling points and the time and the value of the initial signal corresponding to each sampling point; judging whether the value ofthe initial signal corresponding to a first sampling point of the relation curve is 0 or not; if the value of the initial signal corresponding to the first sampling point of the relation curve is not0, constructing an optimization function according to the relation curve; multiplying the value of the initial signal corresponding to each sampling point by a corresponding value of the optimizationfunction to get an optimization value of each sampling point; and generating a control signal according to the correspondence between optimization values and time, wherein the control signal is used to drive a motor to vibrate. The generation method of a control signal in the invention can reduce the oscillation response and improve the user experience.

The invention discloses a one-way vibration system, device and method based on linear motors. The system comprises the multiple linear motors, a control chip and driving circuits, wherein the resonant frequencies between any two linear motors differ in integral multiple, the control chip is used for outputting driving signals corresponding to the linear motors one to one according to a first user instruction, the frequency of each driving signal is within the preset range by adopting the resonant frequency of the corresponding linear motor as the reference, and any two driving signals have phase angles with adjustable phases; the driving circuits correspond to the linear motors one to one and are used for driving and amplifying the driving signals, and sending the driven and amplified driving signals to the corresponding linear motors so as to control the corresponding linear motors, and then the one-way vibration effect is obtained. It is thus clear that the vibration effects of the multiple linear motors can be equivalent to one-way vibration after being synthesized, and the application range is enlarged.

The invention relates to a vibration generation method and device, a vibration control method and system, electronic equipment and a storage medium. The vibration generation method comprises the following steps: identifying an audio beat in an audio signal, acquiring a plurality of note energies of the audio signal according to the audio beat, respectively carrying out normalization preprocessingon the plurality of note energies to obtain a plurality of normalization energies, and according to the plurality of normalized energies, generating a tactile vibration file corresponding to the audiosignal. By adopting the method, the tactile vibration effect can be flexibly matched with the beat of the audio signal, and the matching accuracy is high.

The invention relates to the technical field of terminal equipment, and discloses a system for generating a motor driving signal. The system comprises a vibration motor, a signal generator, an acceleration sensor and a control device, wherein the vibration motor is configured to generate vibration under action of a voltage driving signal; the signal generator is electrically connected with a driving end of a motor and is configured to be controlled to generate a voltage driving signal for driving the motor to vibrate; the acceleration sensor is connected with a vibration end of the motor and is configured to sense the vibration of the motor and convert the sensed vibration into an electric signal; and the control device is configured to control the signal generator according to the electric signal and adjust the voltage driving signal till that the vibration of the vibration motor meets a condition. Related parameters of the vibration motor can be counted and measured by utilizing thecontrol device, iterative attempts are performed by adjusting the voltage driving signal for multiple times to obtain a relatively appropriate waveform of the voltage driving signal, and the vibrationmotor can vividly simulate a vibration hand feeling of a mechanical key by adopting the voltage driving signal.