36results about How to "Control heat" patented technology

The invention relates to a control device for a hybrid vehicle power transmitting apparatus. A heat generation control is executed to increase a heat generation amount of an electric motor M1 when a differential portion 11 is placed in a non-differential state and a temperature of a shifting mechanism 10 is less than a given transmitting apparatus temperature determining value TEMP11. This allows the first electric motor M1 to develop a heat with which the temperature of a shifting mechanism 10 is promptly raised, thereby promptly completing a warm-up of the shifting mechanism 10 to achieve improved fuel consumption.

The present invention proposes a VR resource hardware adaptation method, comprising the following steps: step a: integrating several VR helmet interfaces into a unified VR interface; step b: collecting test data of the several VR helmets, and according to the test data A temperature prediction model is established, and the temperature trend of the processor of the VR helmet is predicted by the temperature prediction model; step c: according to the screen characteristics of the several VR helmets, the images output by the screen of the VR helmet are processed Amendment; Step d: collect the controller orientation data during the VR experience process, and filter the orientation data; the method of the present invention can be deployed to any VR helmet through one-time VR resource development, greatly reducing developer testing and adaptation Reduce the workload of VR helmets, speed up the development of VR resources, and improve the quality of VR experimental resources.

The invention belongs to the technical field of sewing equipment and particularly relates to a sewing machine with a novel automatic pressing foot lifting structure. The sewing machine comprises an automatic pressing foot lifting device, an outer frame of a pressing foot electromagnet of the automatic pressing foot lifting device is provided with a maintaining device, and the maintaining device abuts against the outer wall of a pressing foot electromagnet core when the pressing foot electromagnet core extends out. The maintaining device is clamped on the end face of the pressing foot electromagnet core when the pressing foot electromagnet core is sucked. Through joint matching of the maintaining device and an auxiliary mechanism, on the premise of keeping the process time unchanged, force lost due to current decrease is supplemented, an electrified current is reduced, the heating quantity is effectively controlled, the temperature is reduced, and it is guarantee that a pressing foot electromagnet finishes pressing foot lifting motion normally.

The invention discloses an elevator door motor switch-in-place torque control method which comprises the following steps: calculating the synchronization frequency f of a motor and integrating the synchronization frequency f to obtain a coordinate conversion angle theta; calculating an M-axis voltage Um corresponding to an expected torque under an M-T rotating coordinate system; calculating a T-axis voltage Ut corresponding to the expected torque under the M-T rotating coordinate system; performing PARK inverse transform according to the T-axis voltage Ut, the M-axis voltage Um and the coordinate conversion angle theta so as to obtain a voltage under a two-phase static coordinate; performing space vector pulse duration modulation on the voltage under the two-phase static coordinate so as to obtain 6 paths of driving signals; and outputting the 6 paths of driving signals to the motor after passing through an intelligent power module, thus obtaining the expected torque. The torque control method provided by the invention can be used for adjusting the motor torque randomly as required, therefore the method can be used for controlling the heating value of the motor during door motor switch-off maintaining and door motor switching-on maintaining; and in addition, because of open-loop control, coders for vector control are not required, thus the device provided by the invention is simple in structure.

A lithium-ion battery pack, including a plurality of battery module packs, the positive poles and the negative poles of the battery module packs are respectively connected through a high-current connecting piece, and the high-current connecting piece includes a straight-shaped copper plate with a row of circular holes. The I-shaped nickel sheet and the I-shaped nickel sheet welded between two adjacent circular holes; the connecting terminals between the battery module groups are provided with a plurality of crimping holes and corresponding connecting wire cores, both of which are welded-pressed Tightly connected by means of connection-welding; the insulation board set at both ends of the positive and negative poles of the battery module group is a bakelite board with a plurality of round holes, and the side facing the positive and negative poles of the battery core is provided with a heat-conducting and explosion-proof insulating sheet; The invention solves the problem of circuit heating during high-current charging and discharging, increases the contact area between the connecting terminal and the wire, and reduces the connection temperature. The insulating plate and the heat-conducting explosion-proof insulating sheet can release the pressure when the battery is working abnormally, thereby preventing the battery from exploding and igniting. The battery pack of the invention has safe and reliable operation and long service life.