Systems and methods for fan typing and anomaly detection may provide a pulse width modulation (PWM) control signal with a predetermined threshold duty cycle to a fan, receive a tachometer signal from the fan while the PWM control signal has the threshold duty cycle, and compare the frequency of the tachometer signal (expressed in revolutions per minute) to an expected tachometer frequency for fans of a first fan type with the PWM control signal having the threshold duty cycle, according to an RPM vs. PWM curve specified for fans of the first fan type. The systems and methods may determine, based on the comparison, that the fan is of the first fan type and provide an indication that the fan is of the first fan type to a fan controller. Deviations from expected tachometer responses may indicate an anomaly, such as an actual fan failure or a predicted fan failure.

A controlling device (100) for executing either one of a current vector control and a voltage phase control such that supply power to an electric machine (9) is controlled in accordance with an operating state of the electric machine (9) calculates a voltage command value for the voltage phase control based on a voltage norm command value indicative of a magnitude of a supply voltage to the electric machine (9) and a voltage phase command value indicative of a phase of the supply voltage. The controlling device (100) calculates a state amount of either one of magnetic flux generated in the electric machine (9) and a parameter correlated to the magnetic flux, based on a current supplied to the electric machine (9) and changes the voltage norm command value in accordance with the state amount.

A controlling device (100) for executing either one of a current vector control and a voltage phase control such that supply power to an electric machine (9) is controlled in accordance with an operating state of the electric machine (9) calculates a voltage command value for the voltage phase control based on a voltage norm command value indicative of a magnitude of a supply voltage to the electric machine (9) and a voltage phase command value indicative of a phase of the supply voltage. The controlling device (100) calculates a state amount of either one of magnetic flux generated in the electric machine (9) and a parameter correlated to the magnetic flux, based on a current supplied to the electric machine (9) and changes the voltage norm command value in accordance with the state amount.

A method for configuring a variable speed drive in charge of power supply of an electric motor. The method comprises the application of a sequence of motor voltages to the electric motor by the variable speed drive and the obtaining, in parallel, of measurements of motor current. The method then determines a feature of the electric motor on the basis of the measurements of motor current and determines a type of electric motor at least as a function of the feature. The variable speed drive is then set up on the basis of the determined type of electric motor.

A method for configuring a variable speed drive in charge of power supply of an electric motor. The method comprises the application of a sequence of motor voltages to the electric motor by the variable speed drive and the obtaining, in parallel, of measurements of motor current. The method then determines a feature of the electric motor on the basis of the measurements of motor current and determines a type of electric motor at least as a function of the feature. The variable speed drive is then set up on the basis of the determined type of electric motor.

Conventional internal combustion engine technology has been around for decades and historically has been the primary power source for virtually all industrial equipment. It relies on carbon-based fuels, is loud, polluting, and the machines it powers are expensive to operate and maintain. A self-contained, rechargeable battery system is provided that possesses improved power than comparable diesel and gas engines and it generates zero emissions, is virtually maintenance free, is quiet, and recharges overnight via a standard electrical outlet. The rechargeable battery power system can be installed in new and used construction equipment and may be used wherever a source of power is required including smart grid application. It can be safely used indoors, in neighborhoods and other locations sensitive to the side effects of internal combustion engines. There is a battery management system that controls sequential shutdown system and a power reserve system to control operation of the battery.

Conventional internal combustion engine technology has been around for decades and historically has been the primary power source for virtually all industrial equipment. It relies on carbon-based fuels, is loud, polluting, and the machines it powers are expensive to operate and maintain. A self-contained, rechargeable battery system is provided that possesses improved power than comparable diesel and gas engines and it generates zero emissions, is virtually maintenance free, is quiet, and recharges overnight via a standard electrical outlet. The rechargeable battery power system can be installed in new and used construction equipment and may be used wherever a source of power is required including smart grid application. It can be safely used indoors, in neighborhoods and other locations sensitive to the side effects of internal combustion engines. There is a battery management system that controls sequential shutdown system and a power reserve system to control operation of the battery.

A speed control system of a universal motor is electrically connected with a universal motor and includes a speed detecting unit and a controller. The controller is provided with a slow start unit, a speed control unit and a stopping-protecting unit. The slow start unit enables the rotating speed of the universal motor to increase smoothly, and the speed control unit controls and compensates the rotating speed of the universal motor in a way of closed loop, able to achieve effect of stepless speed adjustment and, when used at low speed, having cutting ability similar to that when operated at high speed. The stopping-protecting unit is able to automatically cut off power and carry out protection when machine table is stopped.

A drive with integrated dynamic load control includes a three-phase asynchronous motor having three phase legs connected in a star circuit, each phase leg having a winding having a coil end connected to a common star point. A load control circuit has a regulating module, an ammeter, a voltmeter and first and second switches. The ammeter and voltmeter detect a phase current and a phase voltage in one phase leg. The regulating module calculates an active power of the phase leg and a total active power of the motor responsive to the phase current and phase voltage. The switches are arranged in two of the phase legs between the respective coil end and the star point and the regulating module interrupts the two phase legs by using the switches when the active power, the total active power or a torque calculated from the total active power exceeds an adjustable limit value.

A drive with integrated dynamic load control includes a three-phase asynchronous motor having three phase legs connected in a star circuit, each phase leg having a winding having a coil end connected to a common star point. A load control circuit has a regulating module, an ammeter, a voltmeter and first and second switches. The ammeter and voltmeter detect a phase current and a phase voltage in one phase leg. The regulating module calculates an active power of the phase leg and a total active power of the motor responsive to the phase current and phase voltage. The switches are arranged in two of the phase legs between the respective coil end and the star point and the regulating module interrupts the two phase legs by using the switches when the active power, the total active power or a torque calculated from the total active power exceeds an adjustable limit value.