Abstract: A multi-level gate driver applied to the SiC metal-oxide-semiconductor field-effect transistor (MOSFET) includes three parts: the SiC MOSFET information detection circuit, the signal level shifting circuit, and the segmented driving circuit. The SiC MOSFET information detection circuit includes the SiC MOSFET drain-source voltage detection circuit and the SiC MOSFET drain-source current detection circuit. The segmented driving circuit includes a turn-on segmented driving circuit and a turn-off segmented driving circuit.

Abstract: A method includes a first brake block of a first brake rubber, a second brake block mounted with a second brake rubber and a mounting base for mounting the first and second brake blocks. The second brake rubber is movable along a direction slanted with respect to an axis of rotation of the traction sheave. A brake block actuation member is triggered by the brake blocks to enable the first and the second brake rubbers to hold the traction sheave. A switching member is also triggered by the action of the second brake rubber, cutting off a safety circuit of the elevator. The external power is cut off, and the brake block actuation member enables contact between the second brake rubber and the traction sheave. The traction sheave further drives the second brake rubber triggering the brake block members to generate frictional braking force to stop the traction sheave.

Abstract: A level shifter includes a power supply rail conversion block, an RS latch and a digital detection block. The power supply rail conversion block comprises a first NLDMOS transistor, a second NLDMOS transistor, a first PLDMOS transistor, a second PLDMOS transistor, a first PMOS transistor, a second PMOS transistor, a first NMOS transistor, a second NMOS transistor, and a first inverter. A gate of the first NLDMOS transistor is connected to an input of the first inverter, a drain of the first NLDMOS transistor is connected to a drain of the first PLDMOS transistor; a source of the first NLDMOS transistor and a source of the second NLDMOS are connected to a referenced ground of an LV power supply rail. The digital detection block comprises a second inverter, a third inverter, a first delay chain, a second delay chain, a first NAND gate and a second NAND gate.

Abstract: A traction sheave safety device and elevator car emergency stop method includes a first brake block of a first brake rubber, a second brake block mounted with a second brake rubber and a mounting base for mounting the first and second brake blocks. It uses a first and the second brake rubbers disposed on the two sides of the traction sheave. The second brake rubber is movable along a direction slanted with respect to an axis of rotation of the traction sheave. A brake block actuation member is triggered by the brake blocks to enable the first and the second brake rubbers to hold the traction sheave. A switching member is also triggered by the action of the second brake rubber, for cutting off a safety circuit of the elevator when the elevator car is in abnormal operation.

Abstract: A resistorless CMOS low power voltage reference circuit is provided. The start-up circuit is used to prevent the circuit to stay in the zero state and stop working when the circuit gets out of the zero state. The self-biased VPTAT generating circuit generate the voltage VPTAT which has positive temperature coefficient. The square-law current generating circuit generates a square-law current which is proportional to ?T2 through the VPTAT. Finally, the reference voltage VREF is obtained by introducing the square-law current into the reference voltage output circuit. The reference voltage VREF of this application can realize approximative zero temperature coefficient in the temperature range of ?40° C.˜100° C. This application improves temperature characteristic which may be poorer due to temperature nonlinearity of carrier mobility based on the traditional subthreshold reference. This application can reduce the power consumption from ?W level to nW level and realize low power consumption.

Abstract: A resistorless CMOS low power voltage reference circuit is provided. The start-up circuit is used to prevent the circuit to stay in the zero state and stop working when the circuit gets out of the zero state. The self-biased VPTAT generating circuit generate the voltage VPTAT which has positive temperature coefficient. The square-law current generating circuit generates a square-law current which is proportional to ?T2 through the VPTAT. Finally, the reference voltage VREF is obtained by introducing the square-law current into the reference voltage output circuit. The reference voltage VREF of this application can realize approximative zero temperature coefficient in the temperature range of ?40° C.˜ 100° C. This application improves temperature characteristic which may be poorer due to temperature nonlinearity of carrier mobility based on the traditional subthreshold reference. This application can reduce the power consumption from ?W level to nW level and realize low power consumption.

Abstract: A disk brake comprising: a brake disk, a moving disk, a fixed disk, a mounting base, a guide rod, a fixed rod, first and second levers, a fixed plate, and first and second spring clamps. Here, one end of the fixed rod is fixed to a plane of the moving disk, the other end of the fixed rod passes through the fixed disk and is fixed to one end of the first/second lever, and the other end of the first/second lever is fixed to the circumferential surface of the fixed disk on the center line of the fixed disk; the fixed plate is fixed to either the guide rod or the mounting base; one end of the first/second spring clamp is connected to the fixed plate, and the other end of the first/second spring clamp is clamped at the middle position between the first and second levers.

Abstract: A disk brake for a traction machine having a damping height of a damping mechanism that can be adjusted integrally. According to one embodiment, a disk brake includes: a static iron core; a spring and a coil assembly in the static iron core; a dynamic iron core assembly including a dynamic iron core, a dynamic disk, and first and second friction rotors configured to fit with the dynamic iron core and the dynamic disk; a plurality of connecting bolts; a plurality of spacers; a damping mechanism on the dynamic iron core assembly, the damping mechanism including a plurality of damping components on the dynamic iron core; an adjusting toothed belt assembly coupled to the damping components and banded to a circumferential outer surface of the dynamic iron core; and an adjusting bracket on the dynamic iron core and coupled to the adjusting toothed belt assembly.

Abstract: A disk brake comprising: a brake disk, a moving disk, a fixed disk, a mounting base, a guide rod, a fixed rod, first and second levers, a fixed plate, and first and second spring clamps. Here, one end of the fixed rod is fixed to a plane of the moving disk, the other end of the fixed rod passes through the fixed disk and is fixed to one end of the first/second lever, and the other end of the first/second lever is fixed to the circumferential surface of the fixed disk on the center line of the fixed disk; the fixed plate is fixed to either the guide rod or the mounting base; one end of the first/second spring clamp is connected to the fixed plate, and the other end of the first/second spring clamp is clamped at the middle position between the first and second levers.

Abstract: A disk brake for a traction machine having a damping height of a damping mechanism that can be adjusted integrally. According to one embodiment, a disk brake includes: a static iron core; a spring and a coil assembly in the static iron core; a dynamic iron core assembly including a dynamic iron core, a dynamic disk, and first and second friction rotors configured to fit with the dynamic iron core and the dynamic disk; a plurality of connecting bolts; a plurality of spacers; a damping mechanism on the dynamic iron core assembly, the damping mechanism including a plurality of damping components on the dynamic iron core; an adjusting toothed belt assembly coupled to the damping components and banded to a circumferential outer surface of the dynamic iron core; and an adjusting bracket on the dynamic iron core and coupled to the adjusting toothed belt assembly.

Abstract: A permanent-magnet synchronous gearless traction machine. The traction machine includes a permanent-magnet synchronous motor having a spindle; a traction wheel coupled to the spindle of the permanent-magnet synchronous motor; a first brake; and a second brake, wherein at least one of the first brake or the second brake is coupled to the traction wheel. As such, in the traction machine, since at least one of the first or second brakes is coupled to the traction wheel, the braking torque generated by the brake coupled to the traction wheel can brake the traction wheel directly, and thereby the operation safety of the elevator can be improved effectively.