Stepper motor kits in south africa automotive vehicles
Stepper motor is an open-loop control motor that converts electric pulse signal into angular displacement or linear displacement. It is the main executive element in modern digital program control system and is widely used.. In the case of non overload, the speed and stop position of the motor only depend on the frequency and number of pulses of the pulse signal, and are not affected by the load change. When the stepping driver receives a pulse signal, it drives the stepping motor to rotate a fixed angle in the set direction, which is called "step angle". Its rotation runs step by step at a fixed angle. The angular displacement can be controlled by controlling the number of pulses, so as to achieve the purpose of accurate positioning; at the same time, the speed and acceleration of motor rotation can be controlled by controlling the pulse frequency, so as to achieve the purpose of speed regulation. Stepper motor is a kind of induction motor. Its working principle is to use electronic circuit to supply power when converting DC into components.
Polyphase timing controls the current. When this current is used to supply power to stepper motor, stepper motor can work normally. The driver is time-sharing power supply for stepper motor. Polyphase timing controller. Although the stepper motor has been widely used, the stepper motor can not be used like the ordinary DC motor and AC motor. It must be composed of double ring pulse signal and power driving circuit before it can be used in the control system. Therefore, it is not easy to use stepping motor well. It involves many professional knowledge such as machinery, motor, electronics and computer. As an actuator, stepping motor is one of the key products of mechatronics, which is widely used in various automatic control systems. With the development of microelectronics With the development of computer technology, the demand of stepping motor is increasing day by day, which is applied in various fields of national economy.
Stepper motor kits in south africa automotive vehicles
Stepping motor, also known as pulse motor, is based on the most basic electromagnet principle. It is an electromagnet that can rotate freely. Its action principle is to generate electromagnetic torque by relying on the change of air gap magnetic conductivity. Attempts to control began around. It is applied to the electrode conveying mechanism of hydrogen arc lamp. This is considered to be the original stepper motor. At the beginning of the 20th century, stepping motors were widely used in automatic exchanges. As western capitalist powers compete for colonies, Stepper motors are used in ships and ships lacking AC power supply "Aircraft and other independent systems have been widely used. In the late 1950s, the invention of transistors was gradually applied to stepping motors, which made digital control easier. After the 1980s, because cheap microcomputers appeared in a multi-functional attitude, the control methods of stepping motors were more flexible and diverse. The biggest difference between stepping motors and motors for other control purposes is that they receive digital control signals The electric pulse signal is converted into the corresponding angular displacement or linear displacement, which itself is an executive element to complete the digital mode conversion.
Moreover, it can open-loop position control, and a specified position increment can be obtained by inputting a pulse signal. Compared with the traditional DC control system, the cost of this so-called incremental position control system is significantly reduced, and there is almost no need to adjust the system. The angular displacement of stepping motor is strictly proportional to the number of input pulses, and in time Synchronization with pulse on. Therefore, as long as the number and frequency of pulses and the phase sequence of motor winding are controlled, the required rotation angle, speed and direction can be obtained.
Stepper motor kits in south africa automotive vehicles
China's stepper motors started in the early 1970s. The development stage of finished products is from the mid-1970s to the mid-1980s. New varieties and high-performance motors are constantly developed. At present, with the development of science and technology, especially the development of permanent magnet materials, semiconductor technology and computer technology, stepper motors have been widely used in many fields. Stepper motor control technology and development overview as a special motor for control, stepper motor can not work directly connected to DC or AC power supply, so special driving power supply stepper motor driver must be used. Before the development of microelectronics technology, especially computer technology, the controller pulse signal generator was completely realized by hardware. The control system used separate components or integrated circuits to form the control loop. Not only the debugging and installation were complex and a large number of components were consumed, but also the circuit must be redesigned once the control scheme was changed. This makes it necessary to develop different drivers for different motors. The development difficulty and development cost are very high, and the control difficulty is large, which limits the popularization of stepping motors. Because stepper motor is a device that converts electrical pulse into discrete mechanical motion and has good data control characteristics, computer has become an ideal driving source of stepper motor. With the development of microelectronics and computer technology, the control mode of combining software and hardware has become the main stream, that is, generating control pulse through program and driving hardware circuit. The single chip microcomputer controls the stepping motor through software to better tap the potential of the motor. Therefore, using single chip microcomputer to control stepping motor has become an inevitable trend, which is also in line with the trend of digital times.
Stepper motor kits in south africa automotive vehicles
Main classification: stepping motor can be divided into reactive stepping motor [variable reliability, VR] and permanent magnet stepping motor PM], hybrid stepping motor [hybrid stepping., HS], single-phase stepping motor, planar stepping motor and other types. Among the stepping motors adopted in China, reactive stepping motor is the main one. There are three types of motor control modes: open-loop control mode and closed-loop control mode, which are closely related to the motor control system. In practical application, semi closed-loop control system is generally classified as open-loop or closed-loop system.
Reaction formula: there are windings on the stator and the rotor is composed of soft magnetic materials. Simple structure, low cost, small step angle, up to 1.2 °, but poor dynamic performance, low efficiency, large heating and difficult to ensure reliability.
Permanent magnet type: the rotor of permanent magnet stepping motor is made of permanent magnet material, and the number of poles of rotor is the same as that of stator. It is characterized by good dynamic performance and large output torque, but the accuracy of this motor is poor, Large step torque angle (generally 7.59 or 15 °). Hybrid: hybrid stepping motor combines the advantages of reactive and permanent magnet type. Its stator has multiphase windings, the rotor adopts permanent magnet materials, and the rotor and stator have multiple small teeth to improve the step torque accuracy. It is characterized by large output torque, good dynamic performance and small step angle, but its structure is complex and the cost is relatively high.
According to the winding on the stator, there are two-phase, three-phase and five equal series. The two-phase hybrid stepping motor is the most popular, accounting for more than 97% of the market share. The reason is that it has high cost performance and is equipped with The effect is good after subdividing the drive. The basic step angle of this kind of motor is 1.8% / step. When equipped with a half step driver, the step angle is reduced to 0.9%. When equipped with a subdivision driver, the step angle can be subdivided up to 256 times [0.007% / micro step). Due to friction and manufacturing accuracy, the actual control accuracy is slightly lower. The same stepper can be equipped with different subdivision drivers to change the accuracy and effect.
Hand Push Roller Ruler Unit of measurement: meter
Made of aluminum and plastic, lightweight. Wheel design, easy to move.
High precision.
Type: Mechanical type
Portable Argon Detector Model No: XLA-BX-Ar Gas Type: Ar
Measuring Range: 0- 100% VOL
Temperature Range: -30 to +70 degree C (Conventional gas); -20 to +50 degree C (Poisonous gas)
Humidity Range:10% to 95% RH (noncondensing) Work Pressure: 86KPa-106KPa
Audible and Visual Alarm (Sound Level: 75 dB )
Portable Oxygen Detector Model No: XLA-BX-O2
Gas Type: O2
Measuring Range: 0-5% VOL, 25% VOL, 30% VOL,
100% VOL
Temperature Range: -30 to +70 degree C (Conventional gas); -20 to +50 degree C (Poisonous gas)
Humidity Range:10% to 95% RH (noncondensing) Work Pressure: 86KPa-106KPa
Audible and Visual Alarm (Sound Level: 75 dB )
Portable Nitrogen Detector Model No: XLA-BX-N2
Gas Type: N2
Measuring Range: 100% VOL
Temperature Range: -30 to +70 degree C (Conventional gas); -20 to +50 degree C (Poisonous gas)
Humidity Range:10% to 95% RH (noncondensing) Work Pressure: 86KPa-106KPa
Audible and Visual Alarm (Sound Level: 75 dB )
Intrinsically explosion-proof safe digital camera Brand: Nikon
Model No.:Excam1201 Pixels:16 million and above Anti-shake performance:
Electronic image stabilization HD camera: HD (1280x720) Display size: Three inches.
Sensor type: CMOS
Special features: explosion-proof, waterproof, dustproof
Protection goggles (Grey) Brand: Honeywell Model:100111 Lens color: : grey
Anti-fog, anti-shock and anti-scratch
Protection goggles (Transparent) Brand: Honeywell Model: 100002
Lens color: transparent
Anti-fog, anti-shock and anti-scratch
Chemical gloves Nitrile gloves rubber
Safety protection from severe chemical.
Thick gloves resist abrasion and shear better than natural rubber. Resistance to formalin, fuel, coolant, bleach, kerosene.
Pack 1 pair.
Acid and alkali resistant apron PVC anti-chemical apron; Waterproof, Oil proof Acid and Alkali Resistant
Wind Sock wind sock ( water proof, reflect light) EA 60
Emergency Stretcher Net Weight：5.8kg
Model No. JYL-Ⅲ(Blue/Wide) Materials：Thickened aluminum alloy pipe Size：190*50cm
Bearing Weight：100kg
Emergency Escape Breathing Device MSA Escape-Air, 10148993/ capacity 3L /work pressure 20MPa and last for 15 minutes.
Key collection hoop Material :
plastic or metal for plate Metal for main part
Replace paper Size : more than 30*20mm
ALTAIR 4X Multi Gas Detector The ALTAIR 4X is an extremely durable Multi gas Detector that simultaneously measures up to four gases from a wide range of Xcell sensor options including combustible gases, O2,CO,H2S.
Dependable multi gas detector tests for LEL, oxygen, carbon monoxide ,hydrogen sulfide,
Economical construction saves users more than 50% on calibration saves ,replacement sensors and maintenance Unit uses 50% less calibration gas per minute than the average detectors within the industry
Ribbed rubber housing provides secure grip and highdurability
Unit features 95+ DB alarm and ultra-bright LEDs Instant Alert provides manual alarm to alert others of a dangerous situation
Eye wash Station Rugged white acrylic station includes two 32 oz. eye wash bottles (each contain a buffered solution with tamper evident seals). Use solution for immediate flushing, then rinse further at a permanent station. Eye Wash Station can be wall mounted or used on a table top. Available as complete station with bottles (EW1) or as board only (EW2). Station size: 16H x 12W x 4D.
Honeywell 32 oz. Can be hung on the wall;
Chinese and English panels, English bottle body.
Fire hydrant SWFH 150, 2-way pedestal type, working pressure:175PSI, hydro test pressure:300PSI, inlet: 4, outlet: 2X2-1/2, Materials: seamless carbon steel pipe
Nylon Non-Conductive Lockout Hasp Model No. 428
Nylon Non-Conductive Lockout Hasp, 1in x 2-1/2in (25mm x 64mm) Jaw Clearance.
Stepper motor kits in south africa automotive vehicles
Working principle: usually, the rotor of the motor is a permanent magnet. When the current flows through the stator winding, the stator winding generates a vector magnetic field. The magnetic field will drive the rotor to rotate by an angle, so that the direction of a pair of magnetic fields of the rotor is consistent with that of the stator. When the vector magnetic field of the stator rotates by an angle. The rotor also rotates an angle with the magnetic field. Each time an electric pulse is input, the motor rotates by an angle and advances one step. Its output angular displacement is directly proportional to the number of input pulses, and its speed is directly proportional to the pulse frequency. Change the order in which the windings are energized and the motor will reverse. Therefore, the rotation of the stepping motor can be controlled by controlling the number and frequency of pulses and the energization sequence of each phase winding of the motor.
CONTACT:
TYPE: AUXILIARY CONTACT FOR MAGNETIC CONTACTOR
AMPERAGE: AC/DC: 3-4 AC / 6 DC
VOLTAGE: AC/DC: 240-400 VAC / 24 DCV
APPLICATION: Spare of MCC
TEXT:Voltage Rating AC/DC: 240-400 VAC, 24 DCV
Current rating AC/DC: 3-4 AC, 6 DC
Number of Auxiliary Contacts NO: 0
Number of Auxiliary Contacts NC: 1
Model: CA5X-01
EAN: 3471522387912
Product ID : 1SBN019010R1001
Suitable for: AX Magnetic Contactor series
MANUFACTURER DETAILS:
MFG: ABB:CA5X-01 10
CONTACT:
TYPE: AUXILIARY CONTACT FOR MAGNETIC CONTACTOR
AMPERAGE: AC/DC: 3-4 AC / 6 DC
VOLTAGE: AC/DC: 240-400 VAC / 24 DCV
APPLICATION: Spare of MCC
TEXT:Voltage Rating AC/DC: 240-400 VAC, 24 DCV
Current rating AC/DC: 3-4 AC, 6 DC
Number of Auxiliary Contacts NO: 1
Number of Auxiliary Contacts NC: 1
Model: CAL5X-11
EAN: 3471522387929
Product ID :1SBN019020R1011
Suitable For: AX- Magnetic Contactor Series
MANUFACTURER DETAILS:
MFG: ABB:CAL5X-11 16
CONTACT:
TYPE: Contact Block
AMPERAGE: 4 /6/8 A
VOLTAGE: 15- 400V / 230v / 120VAC
APPLICATION: Spare of MCC
TEXT:Contact Block (MCB-10 )
Power Supply Voltage : 15- 400V / 230v / 120VAC
Ampere :4 /6/8 A
Product ID :1SFA611610R1001
EAN :7320500544327
Make : ABB
MANUFACTURER DETAILS:
MFG: ABB:MCB-10 10
CONTACT:
TYPE: AUXILIARY CONTACT FOR MAGNETIC CONTACTOR
AMPERAGE: AC/DC: 3-4 AC / 6 DC
VOLTAGE: AC/DC: 240-400 VAC / 24 DCV
APPLICATION: Part No.:1SBN010110R1010
TEXT:Part of IAC Local Control Panel
Voltage Rating AC/DC: 240-400 VAC, 24 DCV
Current rating AC/DC: 3-4 AC, 6 DC
Number of Auxiliary Contacts NO: 1
Model: CA4-10
EAN:3471523130005
Make: ABB
MANUFACTURER DETAILS:
MFG: ABB:Model: CA4-10 10
