- 27.03.2017
- Posted by: admin
- Category:
The frequency converter – electronic device for changing the frequency of the current (voltage). It converts the input sinusoidal voltage of fixed frequency and amplitude of the starting pulse voltage of variable frequency and amplitude by means of PWM (Pulse Width Modulation) .Such way gradually increasing the frequency and amplitude of voltage supplied to the stator windings of the induction motor, it is possible to ensure a smooth speed control the motor shaft.
Advantages of frequency inverters on the hoisting cranes:
- Smooth start and drive stop retaining moment. In practice, this gives a completely unstressed work mechanism, saving the gearbox and the coupling half against wear;
Braking mechanism provided by the motor. The brake is applied on the already stopped drive only to hold the mechanism in a stopped state. Wear of the brake linings is reduced by 99%;
Ability to reduce / increase the nominal motor shaft turns;
Maximum motor overload protection, short circuit, phase failure, etc.
During the work on the crane:
- dismantled all the old wiring, control panels, PCO, brake resistance unit;
if necessary, dismantled controls, crane lighting and limit switches;
It occurs after the installation of new wiring installation cabinet (s) with a frequency converter control unit (s) of the braking resistors, radio control from the control panel;
Further there is a start-up electric crane circuit configuration of frequency converters and the test tap.
To compile the calculation of the cost of upgrading the customer tap to answer the following questions:
- Passport power engines mounted on the crane, their type and amount;
- Location of crane after modernization: a cabin (seat control the crane) from the floor and standby radio control overhead console with a suspended floor console;
- Current supply type – trolley, bus duct, or cable;
- Operating temperature range of operation of the crane and the crane geographical location.
Deadlines:
- Calculation of the electrical value after specifying the customer data – 1 day;
Manufacture of electrical equipment kit – 10 – 40 days (depending on the complexity of the crane and the availability of materials, frequency inverters on their own stock)
Disassembly / assembly and commissioning the bridge crane – 1-4 days, gantry crane – 2-6 days, portal and tower crane 3-10 days.To compile the calculation of the cost of upgrading the customer tap to answer the following questions: - Passport power engines mounted on the crane, their type and amount;
Location of crane after modernization: a cabin (seat control the crane) from the floor and standby radio control overhead console with a suspended floor console;
current supply type – trolley, bus duct, or cable;
Operating temperature range of operation of the crane and the crane geographical location.
Technicians PE ‘Gal-Automatics’ – are highly skilled professionals who took part in the design, installation and commissioning of many projects with variable frequency drives.
On the modernization package (reconstruction) of a crane consists of:
- leaving specialist (if necessary);
calculation and development of the necessary technical documentation package;
Delivery of the complete set of electrical equipment necessary for the modernization of the crane;
check the mounting teams for installation and commissioning of the crane, frequency converters.
Start saving money with us now – we are always ready to go at their own expense to the place of the planned modernization (reconstruction) and provide the Client with enhanced technical and commercial proposal.
Series ЕМ-11
1 PHASE
Power kW: 0.75-2.2 kW
The number of phase / voltage at Rin, B: 1-phase
The range of voltage on vh.V: 220
The range of voltage on vyh.V: 220
The range of the operating frequency in Hz: 0-300 Hz (vector reezhim) 0-3000Gts (wills-chastony
Control Method: Vector
Engine: Asynchronous / Synchronous
Overload torque: 150% to 60 s.
3 PHASE
Power kW: 0.75-450 kW
The number of phase / voltage at Rin, B: 3-phase
The range of voltage on vh.V: 380V
The range of voltage on vyh.V: 380-460V
The range of the operating frequency in Hz: 0-300 Hz (vector reezhim) 0-3000Gts (wills-chastony
Control Method: Vector
Engine: Asynchronous / Synchronous
Overload torque: 150% to 60 s.
DOWNLOAD – Full description ЕМ-11
| Тип перетворювача | SV xxx iS7 – 4x | |||||||||
| 008 | 015 | 022 | 037 | 055 | 075 | 110 | 150 | |||
| Потужність двигуна (кВт) | 0,75 | 1,5 | 2,2 | 3,7 | 5,5 | 7,5 | 11 | 15 | ||
| Вихідні параметри | Потужність (кВт) | 1,9 | 3 | 4,5 | 6,1 | 9,1 | 12,2 | 18,3 | 22,9 | |
| Номінальний струм (А) | 2,5 | 4 | 6 | 8 | 12 | 16 | 24 | 30 | ||
| Максимальна частота (Гц) | 0 — 400 Гц (векторне керування без давача: 0-300Гц, векторне керування з давачем: 0-120Гц) | |||||||||
| Максимальна напруга (В) | Три фази, 380-480 В | |||||||||
| Вхідні параметри | Напруга (В) | Три фази, 380-480 В (10%) | ||||||||
| Частота (Гц) | 50-60 Гц (5%) | |||||||||
РОЗШИРЕНИЙ РЯД iS7
| Тип перетворювача | SV xxx iS7 – 4х | |||||||||
| 185 | 220 | 300 | 370 | 450 | 550 | 750 | ||||
| Потужність двигуна (кВт) | 18,5 | 22 | 30 | 37 | 45 | 55 | 75 | |||
| Вихідні параметри | Потужність (кВт) | 29,7 | 34,3 | 45 | 56 | 68 | 82 | 100 | ||
| Номінальний струм (А) | 39 | 45 | 61 | 75 | 91 | 110 | 152 | |||
| Максимальна частота (Гц) | 0 — 400 Гц (векторне керування без давача: 0-300Гц, векторне керування з давачем: 0-120Гц) | |||||||||
| Максимальна напруга (В) | Три фази, 380-480 В | |||||||||
| Вхідні параметри | Напруга (В) | Три фази, 380-480 В (10%) | ||||||||
| Частота (Гц) | 50-60 Гц (5%) | |||||||||