DELTA motor Germany DELTA model DELTA price

DELTA motor refers to the engine that controls the operation of mechanical components in a servo system; it is an auxiliary motor for indirect speed variation. Servo motors can control speed with very high positional accuracy, converting voltage signals into torque and rotational speed to drive controlled objects. The rotor speed of a servo motor is controlled by the input signal and responds quickly. In automatic control systems, it serves as an actuator, featuring small electromechanical time constants and high linearity, converting received electrical signals into angular displacement or angular velocity output on the motor shaft. It is divided into two main categories: DC and AC servo motors. Its main characteristics are that there is no self-rotation when the signal voltage is zero, and the speed decreases uniformly as torque increases.

DELTA motor cooling method

Motor cooling methods include: 1) Cooling: During energy conversion in a motor, a small portion of losses is always converted into heat, which must be continuously dissipated through the motor housing and surrounding medium; this process of heat dissipation is called cooling. 2) Cooling medium: A gaseous or liquid medium that transfers heat. 3) Primary cooling medium: A gaseous or liquid medium with a temperature lower than that of a specific motor component, which contacts said component and carries away the heat released by it. 4) Secondary cooling medium: A gaseous or liquid medium with a temperature lower than that of the primary cooling medium, which removes the heat released by the primary cooling medium via the motor's outer surface or cooler. 5) Final cooling medium: The final medium to which heat is transferred. 6) Ambient cooling medium: The gaseous or liquid medium in the environment surrounding the motor. 7) Remote medium: A medium located far from the motor, which absorbs heat from the motor and discharges the cooling medium to a remote location via inlet and outlet pipes or channels. 8) Cooler: A device that transfers heat from one cooling medium to another while keeping the two cooling media separated.

DELTA motor working principle

The motor stator winding is powered by a single-phase supply, and the rotor is an armature winding with a commutator short-circuited by brushes. The brushes can be moved to any position relative to the stator winding as required. By moving this position, the direction of rotation, mechanical characteristics, and operating speed of the rotor can be changed. When the brushes deviate counterclockwise from the geometric neutral axis, the rotor rotates clockwise; when the brushes deviate clockwise from the geometric neutral axis, the rotor rotates counterclockwise. Because the direction of rotation is opposite to the direction of brush deviation, it is called a repulsion motor. It has mechanical characteristics similar to those of a series-wound DC motor and is used to drive mechanical loads requiring heavy starting. It is suitable for applications with single-phase power supply that require speed regulation and reversal of direction. Some motors are equipped with overload protection devices to protect the motor from burnout due to excessive current during overload. This bimetallic element expands when heated, opening the contacts and breaking the circuit. When the overload is removed and the motor cools down, the contacts close again. The rotor coil is connected to the commutator and is not connected to the external circuit. The short-circuited brushes press against the commutator, inclined at an angle to the central axis of the stator magnetic field. When energized, the stator magnetic field induces an armature field in the armature. The poles of this magnetic field are near the brushes. The polarity of the armature field at this location is the same as that of the adjacent stator pole, generating mutual repulsion between them and causing the armature to rotate.

DELTA motor applications

Application of motors in precision machining: To improve productivity and enhance machining quality, ultra-high-speed and ultra-high-precision machining are key. Currently, the feed speed requirements for CNC machine tools have increased from 6～8m/min to greater than 50～60m/min, with acceleration requirements reaching 1～5g. This specification cannot be achieved by traditional feed drive systems with intermediate transmission and conversion stages, necessitating the search for a new actuator. This has led to the emergence of the new generation of linear motor feed drive systems. Since the end of the 20 century, international machine tool exhibitions worldwide have shown that the direct application of linear motors to CNC machine tools, machining centers, presses, etc., is a trend. Linear motor drives feature high thrust, high speed, high precision, and smooth feed motion. The machine tool feed system uses direct drive by linear synchronous motors. The biggest difference from the original rotary motor transmission method is the elimination of the mechanical intermediate transmission link between the motor and the worktable (slide), i.e., reducing the length of the machine tool feed transmission chain to zero; hence, this transmission method is called "direct drive," also known as "zero transmission." Direct drive avoids disadvantages such as backlash, inertia, friction, and insufficient rigidity in lead screw transmission, bringing performance indicators and advantages unattainable by the original rotary motor drive method.

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