EPG is specialized in design, company and income of agricultural machinery and farm implements, which has an independent import and export rights.
Overview
Fast Information
- Applicable Industries:
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Production Plant
- Brand name Title:
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OEM
- Merchandise NO:
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SYF
- Temperature Rise:
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80℃ MAX (Rated existing, 2pahse electrical power)
- Voltage:
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12V/24V/48V
- Motor sort:
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DC Step Motor
Packaging & Shipping and delivery
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Lead Time
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Quantity(Pieces) 1 – 5 6 – ten >10 Est. Time(days) 3 seven To be negotiated
On-line Customization
tepper motors are recognized for their accurate positioning abilities and high torque supply at low speeds, but they need watchful sizing to make sure the motor matches the load and application parameters, to minimize the possibility of lost actions or motor stalling. Introducing a gearbox to a stepper motor technique can increase the motor’s overall performance by reducing the load-to-motor inertia ratio, growing torque to the load, and lowering motor oscillations.
Lessen load-to-motor inertia ratio
One particular lead to of skipped steps in stepper motor applications is inertia. The ratio of the load inertia to the motor inertia establishes how well the motor can drive, or handle, the load — specifically throughout acceleration and deceleration parts of the transfer profile. If the load inertia is drastically larger than the motor inertia, the motor will have a tough time controlling the load, and overshoot (advancing much more actions than commanded) or undershoot (lacking methods) can arise. A extremely high load-to-motor inertia ratio can also result in the motor to attract abnormal current and stall.
Motor Inertia Ratio
JL = inertia of load
JM = inertia of motor
One particular way to minimize the inertia ratio is to use a larger motor with larger inertia. But that implies larger expense, far more excess weight, and trickle-down outcomes on other parts of the system these kinds of as couplings, cables, and generate components. Rather, incorporating a gearbox to the technique decreases the load-to-motor inertia ratio by the square of the equipment ratio.
i = gear reduction
Enhance torque to the load
Yet another reason to use a gearbox with a stepper motor is to improve the torque available to drive the load. When the load is driven by a motor-gearbox combination, the gearbox multiplies the torque from the motor by an volume proportional to the equipment ratio and the performance of the gearbox.
To = torque output at gearbox shaft
Tm = torque output at motor shaft
η = gearbox effectiveness
But even though gearboxes multiply torque, they minimize speed. (This is why they’re sometimes referred to as “gear gearboxes” or “speed gearboxes.”) In other phrases, when a gearbox is attached to a motor, the motor have to change quicker — by a element equal to the gear ratio — to produce the goal speed to the load.
No = pace output at gearbox shaft
Nm = speed output at motor shaft
And stepper motor torque normally decreases speedily as pace raises, thanks to detent torque and other losses. This inverse relationship among speed and torque indicates it’s only practical to enhance pace by a certain quantity prior to the motor is not able to deliver the essential torque (even when multiplied by the gear ratio).
overall performance-curve-chart-motors-same-volume-speeds
Observe that stepper motor steady torque (environmentally friendly) falls off quickly as velocity boosts, unlike servo motor steady torque (blue), which is fairly flat even at higher motor speeds.
Lessen resonance and vibration
But rushing up the motor does have a advantage. The further speed needed by the motor when a gearbox is mounted means the motor operates exterior its resonant frequency selection, in which oscillations and vibrations can trigger the motor to drop steps or even stall.
gearbox with stepper motor
The stepper motor with a gearbox (top) displays significantly less vibration than the non-geared stepper motor (base), specifically at reduced speeds in the resonant frequency range.
Graphic credit history: Oriental Motor United states Corp.
gearbox with stepper motor
Picture credit score: Oriental Motor Usa Corp.
In addition to ensuring the gearbox has the correct torque, speed, and inertia values, it’s critical to pick a large-precision, low-backlash gearbox — specially when connecting the gearbox to a stepper motor.
Recall that stepper motors run in an open-loop method, and backlash in the gearbox degrades the system’s positioning precision, with no opinions to check or proper for positioning glitches. This is why stepper programs frequently use large-precision planetary gearboxes, with backlash as minimal as two to three arcminutes. And some companies offer stepper motors with harmonic gears that can exhibit zero backlash beneath most software conditions.
EPG – a single of the biggest electrical power transmission areas, worm geared motors, agricultrual gearbox, planetary gear drive, helical,screw, beve gears and spare elements and agricultural parts manunfacuter in China