摘要:
An electronic control apparatus can be reduced in size and cost by eliminating certain parts such as a power board, etc. The apparatus includes a housing, a heat sink attached to one end of the housing, semiconductor switching elements mounted on the heat sink, a circuit board arranged in opposition to the heat sink, and a plurality of conductive plates electrically connecting the circuit board and the semiconductor switching elements. The heat sink is composed of a heat sink main body, and an anodized aluminum film formed at least on a surface of the heat sink main body at a side at which the power device is mounted thereon, and the heat sink main body has outer peripheral end faces arranged in opposition to inner wall surfaces of an opening portion of the housing.
摘要:
An electric motor control apparatus that can quickly and accurately locate a short-circuit fault point. The electric motor control apparatus includes: a current controller determining respective phase voltage commands according to currents flowing in respective phases of an electric motor and a torque current command; a switching element drive circuit instructing, based on the respective phase voltage commands, an inverter to perform a switching operation; the inverter receiving a switching operation signal to drive the electric motor; current detectors disposed in series with the switching elements in the respective phases of the inverter; and a short-circuit point locating mechanism storing a test pattern indicative of a predetermined combination for turning on the switching elements of the inverter, and locating a short-circuit fault point based on the test pattern and current detection values in the respective phases detected by the current detectors in response to the test pattern.
摘要:
An electronic control apparatus can be reduced in size and cost by removing a metal substrate part. The apparatus includes a housing having a pair of opening portions at its opposite sides, a heat sink attached to one of the opening portions of the housing, a pair of semiconductor switching elements mounted on the heat sink, a circuit board arranged in opposition to the heat sink, a plurality of conductive plates electrically connecting the circuit board and the semiconductor switching elements to each other, and a plate spring urging the semiconductor switching elements against the heat sink. The plate spring has engagement portions press-fitted to and engaged with inner sides of holding portions which are formed on the housing, and the housing has engagement portions engaged with protruded portions of the heat sink.
摘要:
In a motor control apparatus in which a higher voltage is directly applied to a driving unit for a motor from a battery and a lower voltage stepped down by a switching regulator from the battery is also supplied to a control unit, the switching regulator is started its switching by a starting signal supplied from the outside of the motor control apparatus and is stopped its switching by the first stopping signal from the outside of a motor control apparatus and the second stopping signal derived from the control unit.
摘要:
An objective is to detect a resolver malfunction without fail, using a low-cost resolver having the small number of the poles, and a control-motor system having advantage in small sizing and high-power outputting. In the control-motor system, the system for driving a 2m-pole motor based on a rotor rotation angle θ detected by a 2n-pole resolver, where m and n being counting numbers, is characterized in that: the sum of the square of a signal modulated by sin θ and the square of a signal modulated by cos θ in the resolver in which an excitation signal generated in said system is modulated by sin θ and cos θ in response to the rotor rotation angle θ of the resolver is compared to a predetermined malfunction threshold value, so that malfunction determination related to the resolver is performed, and also, given that the sum is a2 when the resolver is recognized to be in normal operation, the malfunction determination threshold value is made to be not smaller than {a×cos((π/2)/(m/n))}2.
摘要:
A motor control apparatus can protect circuit elements in an appropriate manner while preventing an incorrect abnormality determination when a motor is in regeneration operation, etc. The apparatus includes a target current calculation section (51), a drive control section (52) that generates a drive signal based on a current deviation ΔI between a target current (IMT) and a detected current (IMS), an abnormality determination section (53) that generates an abnormality determination signal based on the target current (IMT) and the detected current (IMS), and a regeneration operation determination section (59) that determines whether the motor (4) is in a regeneration operation state. When it is determined that the motor (4) is in a regeneration operation, a determination threshold of the abnormality determination section (53) is set to a value larger than a determination threshold during power running operation.
摘要:
An electric power steering control apparatus can limit a motor impression voltage thereby to maintain an appropriate motor output even upon occurrence of a failure of a motor current detection circuit or a motor current feedback control system. The apparatus includes a motor that generates an assist force to the steering system, an input processing section that takes in a steering torque signal from a torque sensor, an output processing section that drives the motor, and a processing unit that provides an instruction to the output processing section based on the steering torque signal. The processing unit includes an impression voltage calculation section that calculates an amount of operation to the motor in accordance with the steering torque signal, and an impression voltage limiting section that limits the impression voltage to predetermined limit values or less corresponding to the direction of the steering torque signal.
摘要:
The invention proposes an electrically operated power steering controller for inputting a driving electric current offset value of higher accuracy and being able to make an offset correction of a driving electric current by using this driving electric current offset value of higher accuracy, and an adjusting method of this driving electric current offset. Therefore, an electric motor driving electric current measuring device of accuracy higher than that of an electric motor driving electric current detector assembled into a controller CNT is prepared separately from this electric motor driving electric current detector. The driving electric current offset value of high accuracy is outputted by this electric motor driving electric current measuring device. An input device for receiving the driving electric current offset value of high accuracy from the driving electric current measuring device is arranged in an offset correcting device or an of f set signal generator within the controller.
摘要:
An objective is to provide a specific realization means for easily determining malfunction of a system in an electromotive power steering controller. The electromotive power steering controller includes: a voltage controller for controlling voltage applying to a motor based on a d-axis current command value and a q-axis current command value that are set by a d-q-command-value setting unit, and a d-axis current detection value and a q-axis current detection value that are obtained by, using the d-q coordinate system, transforming three-phase ac current that has been actually flowing in the motor and has been detected by a current detector; and a malfunction determining unit for determining that malfunction has occurred in the control system if at least one of the phase-current detection value is out of a first predetermined permissible range.
摘要:
A motor control device for a multiple-phase motor includes a drive circuit (PWM inverter) which drives the multiple-phase motor (three-phase DC brushless motor), and a micro-controller that controls the drive circuit, wherein the micro-controller limits a motor current in accordance with an integrated value of a predetermined function of a phase current.