Loading patent…
AssigneeGuangzhou Newlife New Material Co., Ltd.
InventorsKai Gong, Jianping Sun, Xiaojing He, Xuezhao Wang, Xiaoming Wang
Estimating the term…
The present invention provides a ring varistor for use in DC micromotor including a ring varistor substrate having nonlinear volt-ampere characteristics and at least three independent electrodes evenly sintered on an end face of the ring varistor substrate. The electrode gap between two adjacent electrodes consists of two straight parallel edges of the two adjacent electrodes, and an inner and an outer concentric arc on the substrate ring, the electrode gap is not orthogonal to the ring. Due to the asymmetry arrangement of the surface electrodes and the electrode gaps, the electrode materials and the substrate materials with different thermal conductivity have no contact cross distribution with each other at the radial electrode gap. During welding, the heat shock is transmitted asymmetrically through the asymmetric electrodes, to improve the uniformity of the heat conduction distribution of the varistor and reduce the defective rate of the substrate welding fracture.
A ring varistor for use in DC micromotor for improving welding fracture, comprising a ring varistor substrate with nonlinear volt-ampere characteristics and at least three electrodes sintered on an end surface of the substrate, wherein an electrode gap between any two adjacent electrodes is an electrode-free substrate enclosed by straight line parallel edges of the two electrodes and an inner and outer concentric arc on the substrate ring, a plane shape of the electrode gap between any two adjacent electrodes does not take any straight line passing through the circular center of the ring varistor in the gap plane as symmetrical axis.
Dependencies are inferred from the claim text.