Abstract: The present invention relates to compounds of formula (I) and pharmaceutically acceptable salts and solvates thereof, wherein the substituents are as defined herein, compositions containing such compounds and the uses of such compounds for the treatment of various diseases and conditions such as asthma.

Abstract: The present invention relates to compounds of formula (I) and pharmaceutically acceptable salts and solvates thereof, wherein the substituents are as defined herein, compositions containing such compounds and the uses of such compounds for the treatment of various diseases and conditions such as asthma.

Abstract: The present invention relates to compounds of formula (I) and pharmaceutically acceptable salts and solvates thereof, wherein the substituents are as defined herein, compositions containing such compounds and the uses of such compounds for the treatment of various diseases and conditions such as asthma.

Abstract: The present invention relates to compounds of formula (I) and pharmaceutically acceptable salts and solvates thereof, wherein the substituents are as defined herein, compositions containing such compounds and the uses of such compounds for the treatment of various diseases and conditions such as asthma.

Abstract: The present invention relates to compounds of formula (I) and pharmaceutically acceptable salts and solvates thereof, wherein the substituents are as defined herein, compositions containing such compounds and the uses of such compounds for the treatment of various diseases and conditions such as asthma.

Abstract: The present invention relates to compounds of formula (I) and pharmaceutically acceptable salts and solvates thereof, wherein the substituents are as defined herein, compositions containing such compounds and the uses of such compounds for the treatment of various diseases and conditions such as asthma.

Abstract: A motor system including a gate drive for driving a motor. An inverter bridge circuit selectively connects power supply link rails to a winding of the motor for energizing the winding with a motoring current. The bridge circuit has upper and lower power switches connected between the winding and the upper and lower power supply link rails, respectively. Each lower switch corresponds to one of the upper switches on the same side of the winding as the lower switch to define an arm of the bridge circuit. A control circuit generates a motor control signal to control the switches. A drive circuit drives the upper switches in response to the state of the corresponding lower switches, which are responsive to the motor control signal. The drive circuit includes a voltage gain element connected to each arm of the bridge circuit that is responsive to current in the respective lower switch for maintaining the corresponding upper switch in its nonconducting state.

Abstract: A capacitively powered motor having a power switching circuit adapted to be connected between a power source and its winding for selectively energizing the winding to generate a magnetic field which causes a rotating assembly to rotate. A position sensing circuit provides a position signal representative of the position of the rotating assembly and a commutating circuit controls the power switching circuit to commutate the power switching circuit at a commutating angle and at a substantially constant duty cycle to achieve a desired rotating speed of the rotating assembly. The commutating circuit varies the commutating angle in response to the position signal to maintain the substantially constant rotating speed of the rotating assembly. As result, the efficiency of the motor is varied to maintain the substantially constant rotating speed.

Abstract: A motor having a power switching circuit adapted to be connected between a power source and its winding for selectively energizing the winding to generate a magnetic field which causes a rotating assembly to rotate. A position sensing circuit provides a position signal representative of the position of the rotating assembly and a commutating circuit controls the power switching circuit to commutate the power switching circuit at a commutating angle to achieve a desired rotating speed of the rotating assembly. The commutating circuit varies the commutating angle in response to the position signal to maintain the substantially constant rotating speed of the rotating assembly. As result, the efficiency of the motor is varied to maintain the substantially constant rotating speed.

Abstract: An electronic control has a heat sink which is electrically isolated from electrical components mounted on a printed circuit board of the control by the printed circuit board itself. Thus, the use of additional materials which are thermally conductive but electrically insulating is avoided. A distributor sheet on the printed circuit board distributes heat substantially uniformly over its surface where contacted by the heat sink to promote heat transfer. The heat sink is shaped to permit devices to be mounted on the same side of the printed circuit board as the heat sink while avoiding contact with the heat sink.

Abstract: A system which drives a compressor of a refrigeration system at one or more speeds. The system includes a motor having a stationary assembly and a rotatable assembly. The stationary assembly includes windings adapted to be commutated in at least one preselected sequence. The rotatable assembly is in magnetic coupling relation to the stationary assembly and in driving relation to the compressor. The motor drives the compressor at a desired speed corresponding to a speed select signal representative of one of the speeds. The system further includes an application specific integrated circuit (ASIC) connected to the motor. The ASIC receives the speed select signal and is responsive to it for generating a commutation reference signal. The commutation reference signal in combination with the commutation signal generates a peak current demand signal and thereby cause the motor to operate at the desired speed.

Abstract: A system which drives a compressor of a refrigeration system at one or more preset speeds. The system includes a motor having a stationary assembly and a rotatable assembly. The stationary assembly includes windings adapted to be commutated in at least one preselected sequence. The rotatable assembly is in magnetic coupling relation to the stationary assembly and in driving relation to the compressor. The motor drives the compressor at a desired speed corresponding to a speed select signal representative of one of the preset speeds. The system further includes an application specific integrated circuit (ASIC) connected to the motor. The ASIC receives the speed select signal and is responsive to it for generating a commutation reference signal. The commutation reference signal in combination with the commutation signal generates a peak current demand signal and thereby cause the motor to operate at the desired speed.

Abstract: A control circuit for a system including an electronically commutated motor. A tachometer pulse signal generator generates a signal representative of the rotational speed of the rotatable assembly of the motor and having a duty cycle. The control circuit includes first and second motor voltage inhibiting circuits. The first inhibiting circuit inhibits application of the motor voltage to the winding stages of the motor in response to the tachometer pulse signal when the motor speed is below the preset minimum speed. The second inhibiting circuit inhibits application of the motor voltage to the winding stages in response to the tachometer pulse signal when the duty cycle of the tachometer pulse signal is outside a preselected acceptable range.