BILLARD ENGRENAGES motor Germany BILLARD ENGRENAGES model BILLARD ENGRENAGES price

BILLARD ENGRENAGES motor is a single-phase AC commutator motor, suitable for single-phase power supply applications requiring speed adjustment and reversal of rotation direction. The stator winding is powered by a single-phase source, and the rotor is an armature winding with a commutator short-circuited via brushes. The brushes can be moved to any position relative to the stator winding as needed. By shifting this position, the rotor's direction of rotation, mechanical characteristics, and operating speed 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.

BILLARD ENGRENAGES motor working principle

The motor's DC disc brake is installed on the end cover at the non-shaft-extension end of the motor. When the brake motor is connected to the power supply, the brake motor operates simultaneously. Due to electromagnetic attraction, the electromagnet attracts the armature and compresses the spring, causing the brake disc to disengage from the armature end cover, and the brake motor begins to rotate. When the power is cut off, the brake motor's electromagnet loses its magnetic attraction, and the spring pushes the armature to press against the brake disc. Under the action of frictional torque, the brake motor stops immediately; corresponding YDEJ two-speed (multi-speed, large pole ratio) motors are also produced. The brake motor power is supplied by the rectifier inside the motor junction box. For 3 kW and below, it is AC220V-DC99V; for 4 kW and above, it is AC380V-DC170V (special designs can also be made according to factory requirements, such as DC24V). The YEJ series electromagnetic brake motor enables rapid braking after power loss. The fast braking time for YEJ2-63-90 motor is less than 0.15 seconds, and for YEJ-100-160 motor is less than 0.20 seconds. The brake motor can achieve slow braking by changing the wiring in the junction box according to user requirements. This series of motors features low noise and reliable braking performance. Its working principle is: when the brake motor is energized, the brake motor converts 220V AC to 198V DC through rectification. At this point, the armature is electromagnetically attracted, placing the brake disc in a rotatable state and allowing the brake motor to rotate freely. When the brake motor loses power, the electromagnet de-energizes, and the armature is immediately held by the spring, pressing the brake disc against the motor's rear end cover to stop rotation.

BILLARD ENGRENAGES motor mechanical characteristics

Due to their low starting current and high starting torque, these motors are often used in locations where starting is difficult, or in mechanisms requiring high starting torque for intermittent instantaneous operation, such as for operating control switches. This allows for high starting torque and the selection of much smaller physical dimensions compared to other types of motors. Additionally, AC/DC universal motors have a wide speed regulation range and can achieve high speeds. Generally, the speed of an asynchronous motor depends on the number of poles and the supply frequency. For a two-pole motor powered by 50Hz, the maximum speed is lower than 3ooor/min. Of course, variable frequency motors can increase speed but require a dedicated power supply. Speed can be increased by reducing the number of armature conductors; for example, AC/DC universal motors for power tools reach speeds of 9900 to 145oor/min, and the maximum speed for high-speed centrifuges in medical devices can reach 20000r/min. Therefore, this type of motor can be selected for applications requiring high speed, such as dental drills driven by AC/DC universal motors. The mechanical characteristics of AC/DC universal motors are relatively soft; as torque increases, speed drops rapidly, limiting the increase in output power. This makes them less prone to overload due to increased load, making them suitable for constant power control applications or places where load torque changes significantly. For example, in the constant tension structure of tape recorders and bicycle transmission mechanisms, this type of motor can replace permanent magnet DC motors. When the load is very small, the speed of an AC/DC universal motor becomes very high, so it cannot operate under full voltage and no-load conditions. Generally, when operating under full voltage, the minimum load should not be less than 25% to 30% of the rated value. When the load is very small, the speed of an AC/DC universal motor becomes very high, so it cannot operate under full voltage and no-load conditions. Generally, when operating under full voltage, the minimum load should not be less than 25% to 30% of the rated value.

BILLARD ENGRENAGES motor applications

Motor variable frequency speed control has become the mainstream speed regulation solution, widely applicable for stepless speed transmission across various industries. Particularly with the increasingly widespread application of inverters in industrial control fields, the use of variable frequency motors has also grown. It can be said that due to the superiority of variable frequency motors over ordinary motors in variable frequency control, wherever inverters are used, variable frequency motors are commonly seen. The social benefits of domesticated high-voltage variable frequency devices are significant, mainly including energy saving, thereby conserving resources and reducing environmental pollution. They eliminate motor starting shocks and impacts on the power grid, reduce motor and equipment failure rates, and improve control precision and automation levels. The economic benefits of variable frequency speed control are also very significant. For pumps and fans, fluid flow is proportional to the first power of speed, torque is proportional to the square of speed, and power is proportional to the cube of speed. As speed decreases, motor power consumption drops cubically, making the energy-saving effect of variable frequency speed control very significant. If flow decreases, speed decreases, head decreases, and motor power consumption decreases, theoretically saving energy. If dampers or valves were originally used for regulation, flow decreases while head increases, and motor power decreases; thus, variable frequency speed control saves more energy than damper or valve regulation. In addition to energy saving and efficiency improvement, there are indirect economic benefits for different loads, mainly including improved power factor, realization of soft start, reduced electrical and mechanical damage to the motor from starting torque, and smooth, stable, and high-precision control.

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