Series LD synchronous generator with medium frequency produced by our company are mainly used for coupling with Power source of airfield and radar and all kinds of communications. We have produced with 11 specifications and 12 types
Including 30, 50, 75, 90, 120, 200KW. The product has various output product including power and medium frequency input, Medium frequency method output, frequency converting of medium frequency (with 50Hz frequency input, 400 Hz frequency Output, frequency converting of double frequency (power output) frequency and medium frequency is both used for Generating power) output, double current ( medium frequency AC and DC is both used for generating power) output. We can Develop products of other specifications and types on requirement of the customer.
This kind of motor meets our GB755-1987 and GJB1213-1991 standard. All the performances and output values of medium Frequency and DC are in complete conformity with all the requirements of electrical performance in ISO6858 and GJB572-1998.
| Excitation method of synchronous generator with medium frequency |
| The generation part or dc generation part of medium frequency is brushless excitation with automatic voltage regulator. |
| Uncontrollable phase compound excitation with brush is adopted in generators of power frequency. |
| Main technical parameters of synchronous generator with power frequency |
| Capacity range(kW) | Medium frequency | 50~200 |
| Frequency converting of M-frequency | 75, 120, 200 |
| Frequency converting of double frequency | 100(p-frequency), 100(m-frequency) |
| Rated current(A) | Double current | 17.1/30, 22.8/7.5, 2X22.8/15 |
| Rated voltage(V) | Power frequency input | 380 |
| Medium frequency output | 200 Or 400 |
| Dc output | 28.5 |
| Rated frequency(Hz) | Power frequency input | 50 |
| Medium frequency output | 400 |
Rated speed
(r/min) | Medium frequency | 1500, 2000, 3000 |
| Frequency converting of M-frequency | 1500, 3000 |
| Frequency converting of double frequency | 1500, 3000 |
| Double current | 4000, 2000, 1500 |
| Rated power factor | Medium frequency output | COSΦ=0.8(lagging) |
| Power frequency output | COSΦ=1 or COSΦ=0.9(advancing) |
| Insulation class | Class F |
| Protective class | IP21 |
| Main performance index of m-frequency of synchronous motor |
| M-frequency output part (the end of the 10m cable) | Setting range of no loading voltage | 95% ~105%Un |
| Adjusting rate of steady voltage | ≤±1% |
| No-loading and 3-phase balance loading | The average gap between each phase voltage and 3-phase voltage should not be more than 0.5% of the average value of the 3-phase voltage,phase gap between adjacent phase voltage is 120°±0.5°. |
| 5% 3-phase unbalance loading | The gap between each phase voltage should not be more than 3V, phase gap between adjacent phase voltage is 120°±2° |
| The modulation value between phase voltage should not be more than 3.5V. |
Rated voltage
From no-loading to full-loading ,power factor of loading will change from 0.8(lagging) to 1,wave form of output phase voltage of m-frequency | Peak coefficient is 1.41±0.1. |
| Total harmonic wave content should not be more than 3%. |
| A harmonic wave content should not be more than 2%. |
| Bias coefficient should not be more than 5%. |
| Dynamic performance | When COSΦ=1\80% rated current is added or reduced from no-loading rated voltage, the transient change of the phase voltage is between 90~140V,the recover time of voltage is not exceed 0.3s; When COSΦ=0.6(lagging) 150% rated current is added or reduced from no-loading rated voltage, the transient change of the phase voltage is between 70~170V,the recover time of voltage is not exceed 1s. |
| M-frequency output part (the end of the 10m cable) | Stable performance | When the loading current changes from no-loading to rated value, output voltage is fixed at 28.5±1.5V, the gap between pulsating voltage peak value and average value is not more than 2V. |
| Dynamic performance | When rated current load from 5%~80% is added or reduced, the transient change of the phase voltage is between 20~35V, the recover time of voltage is not exceed 0.2s,When 150% rated current is added or reduced from no-loading rated voltage is between 15~45V, the recover time of voltage is not exceed 1s. |
