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1537 results about "Maximum torque" patented technology

Starting torque is the maximum torque that can be produced by a motor in order to start rotational movement of the load. Stall torque is the maximum torque that can be applied to the shaft and cause the motor to stop rotating. When there is no rotation in the motor, the wound coils are acting as a fixed resistance.

Maximum torque driving of robotic surgical tools in robotic surgical systems

In one embodiment of the invention, a control system for a robotic surgical instrument is provided including a torque saturation limiter, a torque to current converter coupled to the torque saturation limiter, and a motor coupled to the torque to current converter. The torque saturation limiter receives a desired torque signal for one or more end effectors and limits the desired torque to a range between an upper torque limit and a lower torque limit generating a bounded torque signal. The torque to current converter transforms a torque signal into a current signal. The motor drives an end effector of one or more end effectors to the bounded torque signal in response to the first current signal.
Owner:INTUITIVE SURGICAL OPERATIONS INC

Mechanical torque amplifier

A power tong system is used to make up and break out threaded pipe connections. Rotary power tongs are connected to an integral backup tong through an extendable hydraulic cylinder and rod. A brake is secured to the rotary tong to selectively hold the pipe stationary relative to the rotary tong. When rotation of the pipe by the rotary tong ceases, the brake is applied, and the cylinder and rod are actuated to angularly displace the power tongs and the backup tong to apply a torque force to the pipe connection disposed between the power tongs and the backup. A resulting torque force is obtained that is greater than the maximum torque that can be exerted by the rotary tong acting alone. The system may also be deployed to apply and hold precise torque forces on the pipe connections. When used to obtain a makeup torque below the maximum rated rotary tong output, the rotary tong is regulated to limit its torque output. When the limited torque is reached, the brake is applied and the cylinder and rod are actuated to apply a smooth, closely controlled increase in torque to the connection. The final torque level may be held constant for a desired length of time. In both the high and low torque applications, the brake prevents the rotary tong from being turned backwardly by the increased torque force applied by actuation of the rod and cylinder assembly. Operation of the system may be manually or automatically controlled.
Owner:TESCO HLDG I

Vehicle motor-generator apparatus utilizing synchronous machine having field winding

A vehicle motor-generator apparatus based on a field winding type of synchronous machine coupled to a power inverter and a battery, wherein the synchronous machine is controlled to operate as a motor to perform engine starting and thereafter be driven by the engine as an electrical generator, wherein during a short time interval at the commencement of engine starting, the armature winding of the synchronous machine is driven by a current such that magnetic flux is produced by the armature winding acting in the same direction as magnetic flux produced by the field winding, to thereby achieve increased torque during the time when maximum torque is required. In addition, the supplied field current is set at a maximum value during only an initial period when engine starting begins, until the first compression stroke of the engine has been completed, and thereafter set to a reduced value until the completion of engine starting, thereby reducing the amount temperature rise within the field winding during engine starting, while ensuring a sufficiently high value of initial torque.
Owner:DENSO CORP

Method for calculating torque required by electric automobile driver

The invention discloses a method for calculating the torque required by an electric automobile driver. The method includes the following steps that the style of the driver and the driving intension of the driver are detected, and the required torque is calculated; the safe interval is detected, and safety modification is conducted on the required torque. According to the method, the driving style and the driving intention of the driver are recognized, torque coefficients required under different styles and different intentions are adjusted, and therefore power is obviously improved for a dynamical type driver under the situation the opening degree does not approach the opening degree of a saturated accelerator pedal, power changes are gentle for an economical type driver under the situation of the normal small pedal opening degree, the situation that economical efficiency is reduced when the load changes of a power system are overlarge is easily reduced, the required torque can be increased according to the emergency degree of acceleration, and the instant requirement of the driver for the dynamic property of the automobile is met. Due to the fact that the maximum torque required by the driver is limited within the critical safety modification distance, when the calculation result is smaller than zero, the torque required by automobile power is forced to reset; the automobile can safely run after other automobiles, and tailgating traffic accidents are avoided.
Owner:DALIAN UNIV OF TECH

Control method and control system of tension in the process of rolling periodic variable-thickness strips

A control method and a control system of tension in the process of rolling periodic variable-thickness strips belong to the technical field of rolling. The method comprises the following steps: dividing segments on the rolled pieces, setting front and back tension values in each zone, realizing tension open-loop control and tension closed-loop control based on maximum torque limit and adding a dynamic torque compensation link and a mechanical friction torque compensation link; controlling torques of an uncoiler and a coiling machine motor and setting speed. The system comprises a rolling mill; coiling machines are arranged at both sides of the rolling mill respectively; length-measuring rollers are arranged between the coiling machines and the rolling mill; thickness gauges are arranged at both sides of the rolling mill respectively; coil diameter gauges are arranged on the coiling machines; a rolling force sensor and a hydraulic cylinder are arranged on the rolling mill; tensiometers are arranged below the length-measuring rollers and pulse coders are arranged on the length-measuring rollers; the thickness gauge, the coil diameter gauge, the rolling force sensor, a displacement sensor of the hydraulic cylinder, the tensiometer and the pulse coder are respectively connected with a computer control system.
Owner:NORTHEASTERN UNIV

Cable tension self-adjustment winch and control method thereof

The invention discloses a cable tension self-adjustment winch and a control method thereof, and belongs to the field of automatic control. The cable tension self-adjustment winch comprises a winding drum and a driving device driving the winding drum to rotate; the driving device is electrically connected with a control device; a winding displacement device parallel to the axial direction of the winding drum is arranged on the outer side of the winding drum; the winding drum is linked with the winding displacement device; a tension detection device is arranged on the winding displacement device, is located between the winding displacement device and the winding drum, and is electrically connected with the control device; and a tension protection device is connected with between the driving device and the winding drum, limits maximum torque output by the driving device and is connected with the control device. Through the measurement on winding and unwinding stressed states and winding and unwinding movement states of a cable and a clutch state of the tension protection device, self-adaption control is carried out on a rotating speed and torque of the winding drum, so that winding and unwinding movement of the cable is coordinated with active movement of a high-speed mobile object, and cable breakage is avoided.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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