DELACHAUX motor Germany DELACHAUX model DELACHAUX price

DELACHAUX motors refer to motors with speeds exceeding 10000r/min. Due to their high speed, their volume is much smaller than that of ordinary motors of the same power. Connected directly to the prime mover, they eliminate traditional reduction gears. Reasons such as the low moment of inertia of high-speed motors result in advantages including high motor power density, effective material savings, high transmission efficiency, low noise, and fast dynamic response.

DELACHAUX motor control principle

Motor control principle: To make the motor rotate, the control unit must first determine the rotor position based on signals sensed by the hall-sensor. Then, based on the stator winding configuration, it determines the sequence for turning on (or off) the power transistors in the inverter (inverter). The upper arm power transistors AH, BH, CH and the lower arm power transistors AL, BL, CL in the inverter are switched to cause current to flow through the motor coils in sequence, generating a forward (or reverse) rotating magnetic field. This interacts with the rotor magnets, causing the motor to rotate clockwise or counter-clockwise. When the rotor rotates to a position where the hall-sensor senses another set of signals, the control unit activates the next group of power transistors. This cycle allows the motor to continue rotating in the same direction until the control unit decides to stop the rotor by turning off the power transistors (or only turning on the lower arm power transistors). To reverse the rotor direction, the switching sequence of the power transistors is reversed. Basically, the switching of power transistors can be exemplified as follows: AH and BL pair → AH and CL pair → BH and CL pair → BH and AL pair → CH and AL pair → CH and BL pair. However, AH and AL, BH and BL, or CH and CL must never be turned on simultaneously. Furthermore, since electronic components have switching response times, these must be considered during the transition between off and on states. Otherwise, if the lower arm (or upper arm) turns on before the upper arm (or lower arm) has completely turned off, it will cause a short circuit between the upper and lower arms, burning out the power transistors.

DELACHAUX motor classification

Theoretically, a single-phase motor can be started if measures are taken to create a certain phase difference between the AC currents flowing through its two windings. The starting point for solving the starting problem is how to create a certain phase difference between magnetic potentials or fluxes that are already spatially offset by a certain angle. Based on this, single-phase AC asynchronous motors are divided into two main categories: split-phase and shaded-pole. Split-phase single-phase motors use capacitors or resistors connected in series with the inductive starting winding to achieve phase shifting, causing a phase difference between the currents in the starting winding and the running winding, known as "split-phase". Capacitor split-phase single-phase motor principle wiring. Due to the significant phase-shifting effect of capacitors, connecting a capacitor of appropriate capacity (generally about 20 to 50μF) in series with the starting winding can make the phase difference between the currents of the two windings close to 90°. At this point, the resulting rotating magnetic field approximates a circular rotating magnetic field, resulting in high starting torque and lower starting current. This type of single-phase motor is widely used. After starting, the capacitor can be retained (known as a capacitor-run motor) or disconnected (known as a capacitor-start motor, executed by a centrifugal switch inside the motor) as needed. To change the motor's direction of rotation, simply swap the output terminals of any one winding, which reverses the phase relationship between the currents of the two windings. Resistance split-phase single-phase motors have fewer turns and thinner wires, resulting in lower reactance and higher resistance compared to the running winding. During resistance split-phase starting, the starting winding current leads the running winding current, resulting in an elliptical rotating magnetic field with high ellipticity. The starting torque is small, so it is only used for no-load or light-load applications and is less common. The starting winding of a resistance split-phase single-phase motor is generally designed for short-term operation and is disconnected by a centrifugal switch after starting, with the running winding maintaining operation. Figure (b) shows the principle wiring of a resistance split-phase single-phase motor.

DELACHAUX motor classification

The stator and rotor cores of the motor have similar tooth slots distributed in a certain pattern on their inner and outer surfaces. The change in the relative position of the stator and rotor core tooth slots causes a change in the magnetic reluctance of the magnetic circuit, thereby generating torque. The rotor core is made of silicon steel sheets or soft magnetic materials. When one phase of the stator is energized, the rotor will rotate to the position where the magnetic reluctance of the magnetic circuit is minimized. When another phase is energized, the rotor rotates to another position, minimizing the magnetic reluctance of the magnetic circuit, at which point the motor stops rotating. At this time, the rotor has rotated by a step angle θb, where N represents the number of operating steps for the rotor to rotate through one tooth pitch; ZR represents the number of rotor teeth. There are many structural forms of reluctance stepper motors. The stator core can be single-segment or multi-segment; the magnetic circuit can be radial or axial; the winding phases can be three-phase, four-phase, or five-phase. The step angle of a reluctance stepper motor can be as small as 1°～15°, or even smaller, with high precision that is easy to ensure, higher starting and operating frequencies, but larger power consumption and lower efficiency. Hybrid stepper motors have stator and rotor core structures similar to those of reluctance stepper motors. The rotor has permanent magnets that generate a unipolar magnetic field in the air gap, which is modulated by the tooth slots of the soft magnetic material on the rotor. Hybrid stepper motors combine the advantages of both permanent magnet stepper motors and reluctance stepper motors, offering small step angles, high precision, high operating frequency, low power consumption, and high efficiency.

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