Abstract: An electric lawn apparatus is provided including a frame, an operator seat mounted on an upper body, two drive motors secured two side plates for driving two rear tires, a mow deck secured below a lower support body of the frame that supports at least one deck motor driving a mow blade, a footrest platform secured to the lower support body of the frame, and a motor control panel located between the mow deck and the footrest platform. The motor control panel includes a plate that supports multiple control modules and controls a supply of electric power to the drive motors and the deck motor.

Abstract: An electric lawn apparatus is provided including a frame having an upper body and a lower support body, two drive motors, a mow deck supporting multiple deck motors, and a battery. The apparatus further includes a motor control panel having one or more control modules that control the drive motors and the deck motors and a regenerative energy control module; and a regenerative energy absorbing module that is physically decoupled from the motor control panel and is activated by the regenerative energy control module when the voltage from the battery exceeds a voltage threshold.

Abstract: A control module for a high power motor includes a mounting frame made up of thermally-conductive material including a bottom wall and four side walls; a circuit board disposed within the side walls of the mounting frame; power switches configured as an inverter circuit oriented in two arrays mounted on opposite surfaces of the circuit board; an auxiliary circuit board extending substantially perpendicularly from the circuit board; capacitors mounted on the auxiliary circuit board with a long axis thereof extending parallel to the circuit board and away from the power switches; and connectors mounted between an edge of the circuit board and distal ends of the capacitors.

Abstract: A cordless compressor has an air storage tank, a pump, a motor for driving the pump, and a controller circuit electrically connected to the motor. A pressure switch assembly is connected to the controller circuit. The pressure switch assembly has first and second pressure switches for sensing pressure within the air storage tank. The controller circuit controls de-activation of the motor depending upon status of the first and second pressure switches.

Abstract: A cordless compressor has an air storage tank, a pump, a motor for driving the pump, and a controller circuit electrically connected to the motor. A pressure switch assembly is connected to the controller circuit. The pressure switch assembly has first and second pressure switches for sensing pressure within the air storage tank. The controller circuit controls de-activation of the motor depending upon status of the first and second pressure switches.

Abstract: A cordless compressor has an air storage tank, a pump, a motor for driving the pump, and a controller circuit electrically connected to the motor. A pressure switch assembly is connected to the controller circuit. The pressure switch assembly has first and second pressure switches for sensing pressure within the air storage tank. The controller circuit controls de-activation of the motor depending upon status of the first and second pressure switches.

Abstract: A power tool is provided including a brushless motor having a stator defining a plurality of phases and a rotor. A power unit is provided including power switches operable to deliver power to the motor. A primary controller is interfaced with the power unit to output drive signals to drive the phases of the motor over a series of sectors of the rotor rotation. The primary controller measures a back-electromotive force voltage of the motor and transitions motor commutation from the present sector to the next sector based in relation to the back-EMF voltage. A second controller is provided to receive at least one of the drive signals, calculate a speed and/or direction of rotation of the motor from the drive signals, and take corrective action to cut off supply of power to the motor if it detects an overspeed condition or incorrect direction of rotation.

Abstract: A power tool including a power supply interface, a motor control circuit configured to regulate supply of power from the power supply interface to a motor, and an input unit actuatable by a user. A no-volt prevention circuit receives a first voltage signal from the power supply interface and a second voltage signal from the input unit. The no-volt protection circuit includes a main semiconductor switch arranged on a current path from the power supply interface to at least one component of the motor control circuit, and a resistor-capacitor circuit to turn the main semiconductor switch ON when the input unit is actuated after the power supply interface is coupled to the power supply, but not when the input unit is actuated before to the power supply interface is coupled to the power supply.

Abstract: A power tool is provided including a brushless motor having a stator defining a plurality of phases and a rotor. A power unit is provided including power switches operable to deliver power to the motor. A primary controller is interfaced with the power unit to output drive signals to drive the phases of the motor over a series of sectors of the rotor rotation. The primary controller measures a back-electromotive force voltage of the motor and transitions motor commutation from the present sector to the next sector based in relation to the back-EMF voltage. A second controller is provided to receive at least one of the drive signals, calculate a speed and/or direction of rotation of the motor from the drive signals, and take corrective action to cut off supply of power to the motor if it detects an overspeed condition or incorrect direction of rotation.

Abstract: A power tool including a power supply interface, a motor control circuit configured to regulate supply of power from the power supply interface to a motor, and an input unit actuatable by a user. A no-volt prevention circuit receives a first voltage signal from the power supply interface and a second voltage signal from the input unit. The no-volt protection circuit includes a main semiconductor switch arranged on a current path from the power supply interface to at least one component of the motor control circuit, and a resistor-capacitor circuit to turn the main semiconductor switch ON when the input unit is actuated after the power supply interface is coupled to the power supply, but not when the input unit is actuated before to the power supply interface is coupled to the power supply.

Abstract: Electrical instrument gage that has a pointer indicator member mounted on a rotatable shaft extending from the gage and including an electrically energizable light source mounted on and extending along the pointer portion of the indicator member. The light source is preferably an electroluminescent lamination that contains a pair of flex circuit terminal contacts extending from its base end. The light source is adhesively attached to the pointer portion of the indicator member. The base element of the indicator member contains a socket portion with a cylindrical opening configured to provide a friction fit to the axial shaft extending from the gage. The outer cylindrical surface of the socket contains an electrically conductive area and the gage contains an electrical wiper contact that makes continual electrical interconnection with the conductive portion of the socket over its rotational range.

Abstract: A secondary air filter assembly that can be attached to the exhaust port of an upright vacuum cleaner is provided. The assembly includes an adapter plate that is adhered, clipped or otherwise affixed to the exhaust port, and a filter carrier that is removably attached to the base. The filter is preferably affixed as a unit to the filter carrier so that the entire filter/carrier unit can be replaced at once. The adapter base can also be used as an attachment for other accessories.

Abstract: A secondary air filter assembly that can be attached to the exhaust port of an upright vacuum cleaner is provided. The assembly includes an adapter plate that is adhered, clipped or otherwise affixed to the exhaust port, and a filter carrier that is removably attached to the base. The filter is preferably affixed as a unit to the filter carrier so that the entire filter/carrier unit can be replaced at once. The adapter base can also be used as an attachment for other accessories.