62results about How to "Increase electrical clearance" patented technology

The invention relates to a motor, in particular to a permanent-magnet synchronous traction motor for a motor train. The permanent-magnet synchronous traction motor for the motor train solves the problem that an existing permanent-magnet synchronous motor is not suitable for being directly used as a permanent-magnet synchronous traction motor for a motor train due to structure defects. The motor adopts a novel rotor magnetic circuit structure punching plate, a high-integration compact type rotor structure, a detachable connecting box structure and a lead structure. A connecting box can be conveniently disassembled so that the motor can be installed easily. A U-shaped magnetic circuit permanent magnet structure of an inner rotor is adopted, the magnetic separation bridge and circular bead design is added, and therefore the start and overload capacity of the motor can be improved. A rotor pressing ring at the driving end integrates rotor core pressing, permanent magnet end face pressing, rotor dynamic balancing and an inner seal ring labyrinth seal structure into a whole, the advantages that the structure is compact, the axial occupied space is small, and the installation is convenient are achieved, and the motor can be widely applied in the field of locomotive trains. According to the research, development and the operation of the permanent-magnet synchronous traction motor for the motor train, realistic bases are supplied for the permanent-magnet motor to research and develop a permanent-magnet traction motor structure with higher power, higher rotation speed and higher power density.

The invention discloses a design method for an integrated fixed contact of an electric power switch, belongs to the field of an electric power device, and specifically relates to the design method for the integrated fixed contact. The method comprises following steps of providing a contact end and a connection end; designing the contact end and the connection end as a continuous and integrated structure; arranging a connection column at the connection end; enabling the connection column to be embedded into the connection end partially; enabling the connection column to be in interference fit with the connection end; arranging a first columnar part on the connection column, wherein the first columnar part is in interference fit with an electric power busbar and is conductive; arranging a second columnar part with conductivity in the first columnar part coaxially; enabling the first columnar part and the second columnar part to be in interference fit; and enabling the thermal expansion coefficient of the second columnar part to be greater than that of the second columnar part. The integrated fixed contact disclosed by the invention has the advantages that 1, more conductive area is produced by using the same overlapping length; further the current density is reduced; low temperature rise of the connection end is realized; 2, the usage of the busbar is reduced; the resource is saved; 3, the electric clearance or security distance is improved; and the electrical security of the device is improved.

A roof high-voltage box installation structure is disclosed. A high-voltage box adopts a glass fiber reinforced plastics top cover. A laminated board is laid on an inner bottom surface of the high-voltage box. An inner surface of the glass fiber reinforced plastics top cover is sprayed with an anti-pollution flashover coating layer. A vacuum main circuit breaker, a voltage transformer, a current transformer, a disconnecting switch, a lightning arrester and three high-voltage cable heads are integrated in the box. A high voltage power supply of a motor train unit is introduced into the high-voltage box by a first high-voltage cable head and is divided into two branches. One branch enters into the voltage transformer. The other branch passes through the vacuum main circuit breaker and then is divided into two branches. One branch is led out by a second high-voltage cable head and the other branch passes through a high-voltage disconnecting switch and is led out by a third high-voltage cable head. The current transformer sleeves the first high-voltage cable head and collects current signals. The lightning arrester, the disconnecting switch and the second high-voltage cable head are connected in parallel. By using the structure of the invention, an influence of an environment on electrical performance of a high voltage component is avoided. Cleaning frequencies are reduced, and manpower and water sources are saved. In addition, an influence of cleaning on the high voltage component is reduced. Discharging performance of an electric appliance is decreased. An insulating plate is laid on the inner bottom surface of the high-voltage box so that an electric clearance between a high voltage wiring point and ground of a high-voltage box body is increased.

The invention discloses an isolating switch operated on the front side, which belongs to the field of power devices and particularly relates to an isolating switch operated on the front side. The isolating switch disclosed by the invention comprises a contact room, a handle arranged on the front side of the switch and wiring terminals connected with static contacts. A connection column is arranged on the wiring terminal, the connection column is partially embedded in the wiring terminal and in interference fit with the wiring terminal, a conductive first column-shaped part in interference fit with a power busbar is arranged on the connection column, the first column-shaped part is internally coaxially provided with a second conductive column-shaped part, the first column-shaped part and the second column-shaped part are in interference fit, and the thermal expansion coefficient of the second column-shaped part is larger than that of the first column-shaped part. The isolating switch disclosed by the invention has the following beneficial effects that a more conductive area can be generated with the same overlapping length, the current density is further reduced, and low temperature rise of the wiring terminal is realized; usage of busbars can be reduced, and resources are saved; and electrical clearance or the safety distance is increased, and the electrical safety of the device is improved.

The invention provides a miniature fuse type isolating switch, which comprises a plurality of contacts arranged on a base, an elastic contact part capable of being clamped with a fusible core being arranged at one end of each contact, the other end of each contact being connected with a wiring terminal, and a first partition plate being arranged between every two adjacent wiring terminals; and a second partition plate, arranged between the two adjacent contacts, the left end surface of the second partition plate exceeding the elastic contact part, and the right end surface of the second partition plate extending into an inner cavity formed by the two adjacent first partition plates. By lengthening the end faces of the two sides of the second partition plate, the creepage distance and the electrical gap between every two adjacent contacts are increased, then the rated stamping withstand voltage and the rated insulation voltage of the product are improved, and the use requirements of customers in some special occasions are met.

The invention discloses an electromagnetic relay for dual-power switching. The electromagnetic relay comprises a base, a sliding block, a contact portion and a magnetic circuit portion; the magnetic circuit portion is arranged on the base, the sliding block is arranged on the base in a sliding mode; the magnetic circuit portion is provided with a pushing arm and is matched with the sliding block,so as to drive the sliding block to move back and forth; the contact part comprises at least two movable springs and at least four static springs; the static springs are arranged on the base and are symmetrically distributed on the two sides of the moving direction of the sliding block in a symmetric manner; the movable reeds are of a straight-piece type structure and are rigid movable springs, and the middle parts of the movable reeds are inserted into the sliding block, and the two ends of each movable reed are fixedly connected with a movable contact in a single-side mode and are matched with static contacts of corresponding static reeds on the two sides of the sliding block. The electromagnetic relay has the advantages of being long in electrical gap between the contact sets and shortin flight time, so that a sufficient isolation requirement between the conversion power sources can be met, the magnetic circuit air gap is reduced, and rapid switching between the conversion power sources is realized.

The invention discloses a main and standby power supply switching circuit. An arranged inboard power circuit can provide a switching execution circuit and a main control circuit with adaptive workingvoltage, so that the main control circuit can control a switch drive chip; and through the arrangement of the switch drive chip, control of a zero line control switch and a fire line control switch can be more convenient, and the circuit is simplified. Therefore, compared with an existing power supply switching circuit of which a double-pole double-throw relay is connected to zero lines and fire lines of a main power supply and a standby power supply at the same time, the main and standby power supply switching circuit disclosed by the invention has the advantages that the zero line control switch outputs a main circuit zero line or a standby circuit zero line, and the fire line control switch outputs a main circuit fire line or a standby circuit fire line, so that power lines can be far away from each other; and furthermore, the fire line control switch only controls on / off of the fire lines of the main power supply and the standby power supply, and the zero line control switch only controls on / off of the zero lines of the main power supply and the standby power supply, so that the relay is prevented from generating an electric arc.

The invention discloses a design method for a dual-power electric change-over switch, belongs to the field of electrical equipment, and in particular relates to the design method for the dual-power electric change-over switch. The design method comprises the steps of arranging an electric operating mechanism provided with an electromagnet and a triggering button, and a contact chamber provided with two power supply wiring terminals and a load wiring terminal; arranging a linking post on each wiring terminal, thus allowing the linking post to be partly embedded into the wiring terminal and in interference fit with the wiring terminal; and arranging a first conductive columnar part in interference fit with a power bus on each linking post, and arranging a second conductive columnar part in the first columnar part in a coaxial manner, and thereby the first and second columnar parts being in interference fit with each other, and the thermal expansion coefficient of the second columnar part being more than that of the first columnar part. The design method disclosed by the invention has the advantages that 1, the more conductive areas are generated with the same splicing length, so that the current density is reduced, and the low temperature rise of the wiring terminal is achieved; 2, the consumption of the buses is reduced, and the resources are saved; and 3, the electric clearance or safe distance is increased, and the electrical security of the equipment is improved.

The invention discloses a junction device. The junction device comprises one or more sleeve components which are arranged side by side. Each sleeve component comprises a sleeve rod, a sleeve rod head, an outer sleeve and an elastic element. One end of each sleeve rod head is connected with one sleeve rod and the other end of each sleeve rod head is in butt joint with an electrical connection component of a wiring board. Each sleeve rod is sleeved with one outer sleeve. Each elastic element is arranged between one outer sleeve and one sleeve rod. Each sleeve rod head is a cup-shaped cylinder. Each cup-shaped cylinder comprises a sleeve rod head post gap. The periphery of each sleeve rod head post gap is composed of two opposite arc surface portions and two parallel plane portions. The junction device has the advantages of being good in universality, low in requirement for machining and assembly precision, and capable of effectively enlarging an electrical gap. In addition, the junction device is simple in structure and high in safety.

The invention relates to a motor, in particular to a permanent-magnet synchronous traction motor for a motor train. The permanent-magnet synchronous traction motor for the motor train solves the problem that an existing permanent-magnet synchronous motor is not suitable for being directly used as a permanent-magnet synchronous traction motor for a motor train due to structure defects. The motor adopts a novel rotor magnetic circuit structure punching plate, a high-integration compact type rotor structure, a detachable connecting box structure and a lead structure. A connecting box can be conveniently disassembled so that the motor can be installed easily. A U-shaped magnetic circuit permanent magnet structure of an inner rotor is adopted, the magnetic separation bridge and circular bead design is added, and therefore the start and overload capacity of the motor can be improved. A rotor pressing ring at the driving end integrates rotor core pressing, permanent magnet end face pressing, rotor dynamic balancing and an inner seal ring labyrinth seal structure into a whole, the advantages that the structure is compact, the axial occupied space is small, and the installation is convenient are achieved, and the motor can be widely applied in the field of locomotive trains. According to the research, development and the operation of the permanent-magnet synchronous traction motor for the motor train, realistic bases are supplied for the permanent-magnet motor to research and develop a permanent-magnet traction motor structure with higher power, higher rotation speed and higher power density.

The invention discloses a side operated isolation switch, belonging to the field of power equipment. The isolation switch disclosed by the invention comprises a contact room, a handle and wiring terminals, wherein the handle is arranged on the side surface of the switch; the wiring terminals are connected with a static contact; the wiring terminals are provided with connection columns; the connection columns are partly embedded in the wiring terminal and in interference fit with the wiring terminal; each of the connection columns is provided with a first conductive columnar part in interference fit with a power busbar; a second conductive columnar part is coaxially arranged in the first columnar part; the first columnar part and the second columnar part are in interference fit; and the thermal expansion coefficient of the second columnar part is greater than the thermal expansion coefficient of the first columnar part. The isolation switch disclosed by the invention has the following beneficial effects: a relatively large conductive area is generated through the same splicing length; therefore, the current density is reduced; low temperature rise of the wiring terminals is realized; the use amount of the busbar is reduced, such that resources are saved; and the electric clearance or the safe distance is enlarged, such that the electric safety of the equipment is improved.

The invention provides an adapter structure and a connector including the same. The adapter structure comprises a main connector, a sub-connector, a first socket contact member and a second socket contact member, wherein the main connector is provided with a through insertion hole and a through first mounting hole; the first socket contact member is installed in the first mounting hole; the sub-connector is provided with a through second mounting hole; the second socket contact member is installed in the second mounting hole; the first end of the sub-connector is embedded in the insertion hole; and the second end of the sub-connector extends out of the insertion hole. The main connector and the sub-connector are nested to form the split-type adapter structure. The first socket contact member extends out of the first mounting hole end and is soldered to a line on a main printed board inside the controller. The second socket contact member extends out of the second mounting hole end to be soldered to a line on a sub-printed board inside the controller. Thus, a purpose of replacing the wires of internal components of the controller with a printed circuit can be well achieved.

The invention discloses a frequency converter and an insulation device of an IGBT (Insulated Gate Bipolar Transistor) wiring terminal. The insulation device is provided with two terminal containing grooves corresponding to two wiring terminals at one end of an IGBT, wherein a fixing plate corresponding to a gap between the two wiring terminals is arranged between the two terminal containing grooves; fixing screws used for mounting and fixing are arranged at one end of the IGBT; and the insulation device is provided with bolt baffle plates for covering the fixing screws in a stretching manner. The frequency converter comprises the insulation device of the IGBT wiring terminal. The insulation device is inserted into the gap of the two wiring terminals at one end of the IGBT by the fixing plate in the middle for fixing, so that the insulation device can be well mounted and fixed; and the bolt baffle plates for covering the fixing screws are arranged on the two sides of the insulation device, so that creepage distances between the wiring terminals and the fixing screws are increased. In addition, the insulation device also increases creepage distances between the fixing screws and a positive copper bar and between the fixing screws and a negative copper bar.