Abstract: A current detection system, a current detection method, and a detection apparatus are provided. The current detection system includes a printed circuit board and N groups of amplification apparatuses, wherein N is a positive integer greater than or equal to 1. Each group includes at least one amplification apparatus. N Rogowski coils are mounted on the printed circuit board. The nth Rogowski coil is capable of being mounted concentric with the nth current-carrying conductor in N current-carrying conductors, which is perpendicular to a plane of the nth Rogowski coil. An output end of the nth Rogowski coil is connected to an input end of the first amplification apparatus in the nth group of the N groups of amplification apparatuses. The foregoing current detection system provides more convenience when being integrated into different electrical equipment, in particular when each group of amplification apparatus includes multiple amplification apparatuses.

Abstract: A current detection system, a current detection method, and a detection apparatus are provided. The current detection system includes a printed circuit board and N groups of amplification apparatuses, wherein N is a positive integer greater than or equal to 1. Each group includes at least one amplification apparatus. N Rogowski coils are mounted on the printed circuit board. The nth Rogowski coil is capable of being mounted concentric with the nth current-carrying conductor in N current-carrying conductors, which is perpendicular to a plane of the nth Rogowski coil. An output end of the nth Rogowski coil is connected to an input end of the first amplification apparatus in the nth group of the N groups of amplification apparatuses. The foregoing current detection system provides more convenience when being integrated into different electrical equipment, in particular when each group of amplification apparatus includes multiple amplification apparatuses.

Abstract: A brushless direct current (DC) motor, including a motor body and a motor controller. The motor controller includes a control box and a control circuit board. The motor body is a plastic-packaged body including a rotary shaft, a rotor assembly, a plastic-packaged stator, a front cover, and a rear cover. The rotor assembly is disposed on the rotary shaft. The plastic-packaged stator is sleeved on the outer side of the rotor assembly. The front cover is disposed on the front part of the plastic-packaged stator. The plastic-packaged stator includes a stator core, a terminal insulator, coil windings, and a plastic-packaged shell. The terminal insulator is disposed on one end of the stator core. The coil windings are coiled on the terminal insulator. The plastic-packaged shell is adapted to connect the stator core, the terminal insulator, and the coil windings together.

Abstract: Provided is a cable management device and a rack-mounted equipment system applying the cable management device. By putting the entire cable management device on a case instead of behind the case, the length of the entire case is reduced and an entire server or storage can be mounted in a shorter rack. In addition, the cable management device can simultaneously serve upper and lower servers or memories, can also solely serve a lower server or memory, and is flexible and efficient to use.

Abstract: Provided is a cable management device and a rack-mounted equipment system applying the cable management device. By putting the entire cable management device on a case instead of behind the case, the length of the entire case is reduced and an entire server or storage can be mounted in a shorter rack. In addition, the cable management device can simultaneously serve upper and lower servers or memories, can also solely serve a lower server or memory, and is flexible and efficient to use.

Abstract: A motor controller, including: a control box including an inner wall; a circuit board; a dissipater; an IGBT module; and an insulating piece. The circuit board is disposed inside the controller box. The dissipater is disposed on the inner wall of the control box. The IGBT module is disposed on the dissipater and is in electric connection with the circuit board. The insulating piece is disposed between the dissipater and the controller and prevents the dissipater from contacting with the control box.

Abstract: A brushless direct current (DC) motor, including a motor body and a motor controller. The motor controller includes a control box and a control circuit board. The motor body is a plastic-packaged body including a rotary shaft, a rotor assembly, a plastic-packaged stator, a front cover, and a rear cover. The rotor assembly is disposed on the rotary shaft. The plastic-packaged stator is sleeved on the outer side of the rotor assembly. The front cover is disposed on the front part of the plastic-packaged stator. The plastic-packaged stator includes a stator core, a terminal insulator, coil windings, and a plastic-packaged shell. The terminal insulator is disposed on one end of the stator core. The coil windings are coiled on the terminal insulator. The plastic-packaged shell is adapted to connect the stator core, the terminal insulator, and the coil windings together.

Abstract: A lead sheath assembly, including a lead sheath; a plurality of external wires; a jumper box; and a connecting terminal. The lead sheath includes a cavity. The jumper box includes: a plurality of through holes, a front end including a front interface, and a rear end including a rear interface. The external wires are mounted on the lead sheath. The jumper box is disposed in the cavity. The connecting terminal is disposed in the through hole.

Abstract: A heat-dissipation structure for a motor controller. The heat-dissipation structure includes a control box, a circuit board, a plurality of radiators, and IGBT modules. The circuit board is installed in the control box. Each radiator includes a side plate and a heat dissipation block protruding from the side plate. The side plate is attached to an inner wall surface of the control box. The IGBT modules are installed on the heat dissipation block, and the pin terminals protruding from the IGBT modules are in electric or electronic connection with the circuit board.

Abstract: A computer-implemented method for adding user-configurable data fields to an existing database table is provided. The method is implemented using a computing device including a processor communicatively coupled to a database. The method includes receiving, from a user, a data structure definition defining a custom data type. The method also includes storing the data structure definition as a custom data type record in a custom data types table within the database. The method further includes creating a first values record in a custom values table within the database. The values record includes a first field that includes a series of bytes formatted using at least the custom data type. The method also includes linking the values record to the custom data type record. The method further includes identifying a target record in the existing database table and linking the target record to the first values record through a reference field.

Abstract: An electronically commutated motor, including: a motor body and a motor controller. The motor controller includes a control box and a circuit board disposed in the control box. The circuit board includes a microprocessor, an inverter circuit, a gear detection circuit, and a power supply. The gear detection circuit includes a plurality of current sensing units. The output end of the power supply supplies power to each circuit, and a first AC input end of the power supply is connected to a first power input line N. The gear detection circuit is connected to a plurality of gear input lines. At least one of the gear input lines is selected to be in an energized state. Each gear input line is correspondingly connected to a first input end of one of the current sensing units.

Abstract: An electronically commutated motor, including: a motor body and a motor controller. The motor controller includes a control box and a circuit board disposed in the control box. The circuit board includes a microprocessor, an inverter circuit, a gear detection circuit, and a power supply. The gear detection circuit includes a plurality of current sensing units. The output end of the power supply supplies power to each circuit, and a first AC input end of the power supply is connected to a first power input line N. The gear detection circuit is connected to a plurality of gear input lines. At least one of the gear input lines is selected to be in an energized state. Each gear input line is correspondingly connected to a first input end of one of the current sensing units.

Abstract: A lead sheath assembly, including a lead sheath; a plurality of external wires; a jumper box; and a connecting terminal The lead sheath includes a cavity. The jumper box includes: a plurality of through holes, a front end including a front interface, and a rear end including a rear interface. The external wires are mounted on the lead sheath. The jumper box is disposed in the cavity. The connecting terminal is disposed in the through hole.

Abstract: A motor controller, including: a control box including an inner wall; a circuit board; a dissipater; an IGBT module; and an insulating piece. The circuit board is disposed inside the controller box. The dissipater is disposed on the inner wall of the control box. The IGBT module is disposed on the dissipater and is in electric connection with the circuit board. The insulating piece is disposed between the dissipater and the controller and prevents the dissipater from contacting with the control box.