456results about How to "Reliable drive" patented technology

A drive force output apparatus has a controller that sets an upper limit of power allowed to be consumed by an auxiliary based on at least a reference power storage amount corresponding to the reference of the range in which the power storage amount of a power storage is monitored and controls a power generator, an electric motor, and the auxiliary such that drive force corresponding to target drive force is output to a drive shaft while the power consumed by the auxiliary remains equal to or smaller than the upper limit.

A drive device for a piezoelectric element includes a transformer, a driver circuit, and a control circuit. The transformer has a primary side and a secondary side. The drive circuit causes the secondary side to generate a drive signal whose frequency varies in accordance with a control signal input to the primary side and to supply the generated drive signal to the piezoelectric element. The control circuit changes a frequency of the control signal in a predetermined frequency range multiple times, detects an impedance change in the piezoelectric element each time the control-signal frequency is changed, determines a resonant frequency of the piezoelectric element on the basis of a transition of the impedance change, and controls the control-signal frequency so that the determined resonant frequency is obtained.

The invention relates to a convertible top for a convertible, comprising a front shell piece, a middle shell piece and a rear shell piece; the shell pieces, when in the closed state, being arranged as a roof over a passenger compartment of the convertible; the front shell piece being capable to be raised during a positively controlled opening operation such that it is moved over the middle shell piece; the rear shell piece being capable to be rotated into a folded-over position; the three shell pieces being designed such that they can jointly pivot counter to a direction of travel about a main bearing into a packaging position; wherein in the packaging position the front shell piece and the middle shell piece are oriented in the same direction over the rear shell piece, that is stored in the folded-over position. The invention further relates to a driving device for a convertible top, comprising a main bearing, a first link, a second link, an intermediate link, the intermediate link being coupled to the second link for activation purposes, a four-bar linkage, the four-bar linkage being coupled to the first link for activation purposes, a first bearing point, a driving cylinder, the driving cylinder being coupled with the main bearing at the first bearing point, and a push and pull rod, the push and pull rod being driven by the driving cylinder and being designed for a simultaneous action of force on the intermediate link and the four-bar linkage.

The invention relates to a stick-slip inertia based serial three-degree-of-freedom piezoelectric precision driving platform and the linear motion along the x and y direction and the rotating motion around the z axis direction can be implemented. The stick-slip inertia based serial three-degree-of-freedom piezoelectric precision driving platform comprises a lower layer of x axis linear driver assembly, a middle layer of y axis linear driver assembly and an upper layer of z axis rotating driver assembly which are connected in turn and sawtooth waves are input towards piezoelectric stacks based on the stick-slip inertia principle to implement the stepping type continuous feeding of an output terminal. The symmetry and the frequency of the sawtooth waves are changed to change the feeding direction and speed. The positioning motion of the rapid feeding positioning and the precise feed positioning can be implemented through different modes of control on the piezoelectric stacks and accordingly the rapid and high precision positioning can be obtained simultaneously. The stick-slip inertia based serial three-degree-of-freedom piezoelectric precision driving platform has the advantages of being small and compact in structure, large in output stroke, adjustable in speed, large in bearing capacity, stable and reliable in work, good in repeatability and suitable for large stroke of precision motion control occasions with strict space size constraints.

An actuating drive for a rotor blade in a wind power installation is provided with an electric motor and a frequency converter which has a rectifier that is to be fed from a power supply system, a link connected to the rectifier, and a d.c.-to-a.c. inverter for feeding the motor, the link carrying a specified nominal operating voltage in a network-fed normal operation of the frequency converter. Furthermore, an auxiliary energy supply device is provided that is connected to the link. The auxiliary energy supply device includes and energy store which makes available a support voltage that amounts to less than 80% of the nominal operating voltage of the link. A diode is connected between the energy store and the link, and is arranged, with regard to its forward direction, in such a way that it feeds a support voltage from the energy store into the link if the link voltage falls below the support voltage. The diode prevents a current flow between the energy store and the link if the link voltage is greater than the support voltage. A charging device for the energy store has a lower charging voltage than the nominal operating voltage of the link.

A belt having a first cover layer with a first top surface and preferably also a second cover layer with a second top surface, wherein the first cover layer and, if present, the second cover layer are made of a foam having a thermoplastic or thermoplastic elastomer, in particular a TPU or PEBA. The belt is suitable e.g. as a machine tape in mail sorting machines and for power transmission.

The invention publishes a light bend combined network transformation installment which based on the Z source power transformation, including: the power transform main return route, the DSP observation system and the IGBT actuation module, the DSP observation system is used in sampling of the voltage, the electric current signal, and operates to obtain the PWM signal sequence with the adjustable pulse width, again transforms the IGBT actuation module into the direct drive IGBT signal, the power transform main return route includes the solar cell array, the Z source impedance network, the contravariant network and the filter reactor, the two out-ports of the solar cell array separately connects with the two input end of the Z source impedance network, the two out-ports of the Z source impedance network separately connects with the two input end of the contravariant network, a out-port of contravariant network connects to a end of filter reactor, a end of the filter reactor is used to connect the end of the electrical network, the another out-port of the contravariant network is used to connect the another end of the electrical network directly, the direct drive IGBT signal which is transformed by the above IGBT actuation module is used in realizing the contravariant network lead and shutdown.

An actuator includes a cylinder, a piston that is disposed in the cylinder and moves by supply and exhaust of working oil to and from the cylinder, a movable rod that is connected to the piston, a screw shaft, at least a part of which is inserted into the movable rod, a nut that is threaded to the screw shaft and moves integrally with the piston, and an electric motor that rotates the screw shaft forward or backward.

A drive force output apparatus has a controller that sets an upper limit of power allowed to be consumed by an auxiliary based on at least a reference power storage amount corresponding to the reference of the range in which the power storage amount of a power storage is monitored and controls a power generator, an electric motor, and the auxiliary such that drive force corresponding to target drive force is output to a drive shaft while the power consumed by the auxiliary remains equal to or smaller than the upper limit.